The Traser P68 Pathfinder GMT is an unusual tritium watch that combines three practical functions in one large outdoor instrument: continuously illuminated tritium markers, a genuine GMT function and an integrated compass. Its Swiss quartz movement, sapphire crystal and 100-meter water resistance make it a capable travel and outdoor watch, while traser’s trigalight illumination keeps the hands and markers visible in darkness without requiring the dial to be charged first. In this review, we examine the Pathfinder GMT’s design, GMT movement, compass, tritium technology, size, strengths and limitations.
Table of Contents
Traser P68 Pathfinder GMT Specifications
| Specification | P68 Pathfinder GMT |
|---|---|
| Model | P68 Pathfinder GMT |
| Example reference | 109524 / 109034 / related GMT references |
| Case diameter | 46 mm |
| Case thickness | Approximately 13 mm |
| Lug width | 24 mm |
| Case material | PVD-coated stainless steel |
| Movement | Swiss quartz GMT |
| Caliber | Ronda 515.24H GMT |
| Functions | Time, GMT, date, 24-hour indication, compass |
| Crystal | Anti-reflective sapphire |
| Water resistance | 10 ATM / 10 bar |
| Illumination | trigalight + Super-LumiNova |
| Tritium tubes | 13 green + 1 blue on documented standard GMT specification |
| Tritium-equipped hands | 4 |
| Compass | Integrated rotating compass ring |
| Crown | Screw-down |
| Bracelet/strap | PVD-coated stainless steel or configuration-dependent |
| Approx. weight | 125 g on documented bracelet configuration |
| Battery life | Up to approximately 45 months |
| Origin | Swiss |
The published technical specifications for the P68 Pathfinder GMT identify the Ronda 515.24H GMT quartz movement, a 46 mm case, approximately 13 mm thickness, 24 mm lug width, sapphire crystal, 10 ATM water resistance and a configuration using 13 green tritium tubes and one blue tube. traser currently lists several GMT references, including blue and green variants, so exact bracelet, color and reference details should be verified before purchase.
What Is the traser P68 Pathfinder GMT?
The P68 Pathfinder GMT belongs to traser’s outdoor-watch collection and is designed around travel and navigation. The GMT function allows the wearer to track another time zone, while the integrated compass ring adds a directional function that is operated through a separate crown. This combination gives the watch a considerably different purpose from a conventional dive watch or military field watch.
The Pathfinder GMT is also an excellent illustration of traser’s particular approach to tritium watches. The brand does not treat tritium simply as an alternative to conventional lume; instead, its proprietary trigalight technology is incorporated into the basic architecture of the watch so that the display remains readable without an external energy source.
That makes the Pathfinder GMT especially interesting for travelers and outdoor users who may move between bright and dark environments throughout the day. The watch does not need to be deliberately charged before entering darkness, while the GMT and compass functions give the wearer information beyond basic local time.
Case and Construction
The Pathfinder GMT uses a 46 mm PVD-coated stainless-steel case with a matte finish intended to reduce glare and give the watch a distinctly technical appearance. At approximately 13 mm thick, it is large but not excessively deep for a watch with this combination of functions.
The 46 mm diameter is the characteristic that will most strongly influence the wearing experience. This is a large watch by almost any conventional standard, although the relatively moderate thickness prevents it from becoming an unusually tall object on the wrist. The broad 24 mm lug width reinforces the substantial proportions and gives the watch a coherent appearance rather than making the case look disproportionately wide.
The PVD coating is also an important part of the Pathfinder’s character. Instead of the reflective appearance associated with polished stainless steel, the finish gives the watch a darker and more utilitarian appearance that fits its outdoor and navigation-oriented purpose.
Size and Wrist Presence
There is no getting around the fact that the Pathfinder GMT is a large watch. At 46 mm, it is considerably larger than the 41 mm Marathon GSAR, and buyers who prefer compact watches should take that dimension seriously rather than assuming the relatively modest 13 mm thickness will make it wear small.
The large case does have a practical rationale, however. The watch incorporates a GMT display, a date, a 24-hour scale, tritium tubes and a separate compass mechanism, all of which require space. The broad dial also gives the various information displays enough separation to remain readable rather than forcing everything into a cramped arrangement.
The approximately 125-gram weight of the documented bracelet configuration is also worth considering. That is not particularly heavy for a 46 mm stainless-steel watch, but it is considerably more substantial than a lightweight composite-case tritium watch. The Pathfinder therefore feels like a piece of equipment rather than an almost weightless tactical watch.
Sapphire Crystal
The P68 Pathfinder GMT uses anti-reflective sapphire crystal, which is an important choice for a watch intended for outdoor use. Sapphire provides excellent resistance to everyday scratching, while the anti-reflective treatment helps preserve dial visibility when the watch is exposed to strong light.
The anti-reflective treatment is particularly relevant to this design because the dial contains considerably more information than a conventional three-hand watch. A reflective crystal can make a complicated dial harder to interpret, especially outdoors, so minimizing reflections helps support the watch’s primary requirement for legibility.
Sapphire also gives the Pathfinder GMT a useful long-term advantage over watches that rely on mineral crystal. Someone buying the watch as an outdoor or travel instrument is likely to encounter hard surfaces and abrasive environments, making scratch resistance more than a cosmetic benefit.
Dial and Legibility
The Pathfinder GMT’s dial has to accomplish more than simply displaying the local time. It incorporates a GMT display, 24-hour information, date information and the visual elements required for the compass function, while still leaving room for the tritium tubes that provide the primary low-light illumination.
The challenge with a multi-function outdoor watch is preventing additional information from making the basic time display difficult to read. The Pathfinder addresses that problem by maintaining large, prominent hands and strong contrast while placing secondary information around the primary display.
The blue version is particularly distinctive because the dial and tritium system create a visual combination that is more refined than the purely tactical appearance associated with some tritium watches. The green version follows the same basic architecture but gives the watch a different visual character. traser currently offers both colorways and multiple references.
The GMT Function
The GMT function is one of the main reasons to consider the Pathfinder rather than a simpler traser outdoor watch. A GMT watch is designed to allow the wearer to track another time zone in addition to local time, which is particularly useful for travelers, people who work across time zones and anyone who regularly communicates with people in another region.
The P68 Pathfinder GMT uses the Ronda 515.24H quartz GMT movement according to the published technical specification for the model. This is an important distinction because the Pathfinder family also includes automatic, solar and other configurations, and those watches should not be assumed to use the same movement.
The quartz movement also makes sense for a travel watch. A mechanical GMT can be attractive from a horological perspective, but quartz provides straightforward timekeeping, avoids the need for winding and is well suited to a watch that may spend long periods being used intermittently.
The Ronda 515.24H GMT Movement
The Ronda 515.24H is a Swiss quartz movement designed for watches requiring GMT functionality. The published Pathfinder GMT specifications identify a monthly accuracy range of approximately -10/+20 seconds, a stop-seconds function and a battery life of up to 45 months.
That combination is appropriate for the Pathfinder’s intended role. A traveler generally benefits more from predictable quartz timekeeping and straightforward operation than from the mechanical complexity of an automatic movement, particularly when the watch is intended to function as an outdoor instrument.
The movement also helps keep the case relatively reasonable in thickness considering the amount of functionality packed into the watch. At approximately 13 mm thick, the Pathfinder is large but not excessively tall for a 46 mm multi-function instrument.
The Compass Ring
The integrated compass ring is arguably the feature that makes the Pathfinder GMT most unusual.
Rather than using a conventional external dive bezel, the watch incorporates a compass ring within the case. The ring is adjusted through a dedicated crown positioned at approximately 8 o’clock, allowing the wearer to set the directional reference independently of the main timekeeping functions. traser provides a dedicated compass manual for the P68 Pathfinder family, confirming that the compass is a functional component rather than simply decorative bezel markings.
The compass is useful as a supplementary navigation aid, but it should be understood in the proper context. A watch-based compass can help establish orientation when the wearer has appropriate reference information and understands how to use it, but it should not automatically be treated as a replacement for a dedicated navigation compass or modern electronic navigation equipment in situations where accurate navigation is critical.
That distinction is particularly important with a watch such as the Pathfinder because its visual design can make the compass appear more sophisticated than the relatively simple underlying principle. The feature is useful, but its usefulness depends on understanding how to employ it correctly.
Tritium and trigalight Illumination
The Pathfinder GMT is especially important from a TritiumLume perspective because it comes from the company responsible for trigalight, one of the best-known implementations of self-powered tritium illumination in watches.
traser describes trigalight as a self-powered illumination technology that provides constant readability without an external energy source. The company currently specifies illumination for up to approximately 20 years on the P68 Pathfinder GMT.
The underlying principle is the same reason tritium illumination is so useful in other watches. Tritium gas is sealed inside tiny glass tubes, and radioactive decay produces the energy that causes the phosphor coating within the tube to glow. Because the process does not depend on stored light energy, the tubes continue producing light in darkness without needing to be charged.
That gives the Pathfinder GMT a major advantage over conventional photoluminescent systems when the watch is used in environments where charging the dial is inconvenient. The wearer can move from daylight into a dark room, tent, vehicle or outdoor environment and still have continuously illuminated hands and markers.
How Bright Is trigalight?
The important characteristic of trigalight is consistency rather than spectacular initial brightness. A conventional Super-LumiNova-style material can appear much brighter immediately after exposure to a strong light source, but its output gradually declines as the stored energy is released.
Tritium behaves differently because the light is generated continuously by radioactive decay. The illumination is therefore generally more subdued than a freshly charged conventional lume display, but it remains available without any preparation.
The Pathfinder GMT combines trigalight with Super-LumiNova, giving the watch access to both approaches. The documented standard GMT configuration uses trigalight for the primary illumination and Super-LumiNova for additional luminous elements.
Tritium vs. Super-LumiNova on the Pathfinder GMT
| Characteristic | trigalight | Super-LumiNova |
|---|---|---|
| Requires exposure to light | No | Yes |
| Works continuously in darkness | Yes | No |
| Initial brightness | Moderate | Can be substantially brighter after charging |
| Output over several hours | Relatively consistent | Gradually decreases |
| Long-term behavior | Becomes dimmer as tritium decays | Luminous material itself does not depend on radioactive decay |
| Primary advantage | Always available | Strong initial brightness |
The combination is sensible because the two technologies complement each other. The tritium provides persistent low-light readability, while Super-LumiNova can provide additional visual brightness where the watch uses conventional luminous material.
The Tritium Tube Layout
One of the more interesting technical aspects of the standard Pathfinder GMT is the arrangement of its tritium tubes. Published specifications identify 13 green tritium tubes and one blue tube, with four hands incorporating tritium.
The different tube color gives the display an additional layer of information. Instead of having every illuminated component appear identical in darkness, the contrasting tube helps the wearer distinguish a particular element of the display from the others.
This is a useful example of how tritium can be used for information hierarchy rather than simply illumination. In a well-designed tritium watch, different colors and positions can help the wearer interpret the display more quickly in darkness, which is particularly useful when the dial contains multiple functions.
Tritium Aging
The P68 Pathfinder GMT’s trigalight system is specified for illumination of up to approximately 20 years, but that should not be interpreted as a point at which the tubes suddenly stop working. Tritium has a finite radioactive half-life, so the illumination gradually becomes weaker as the gas decays.
This is an important consideration when buying an older Pathfinder GMT. A used example that has been in service for many years should not be expected to have the same brightness as a new watch, even if the tritium tubes are functioning normally.
For collectors, this gradual change is also part of the nature of tritium watches. The illumination provides useful information about the age and history of a watch, and older tritium watches can develop a noticeably different nighttime appearance from newer examples.
Water Resistance
The Pathfinder GMT is rated to 10 ATM / 10 bar, giving it a water-resistance rating equivalent to approximately 100 meters. That is considerably less than the Marathon GSAR’s 300-meter rating, but it is more than adequate for many normal outdoor and travel situations.
The 10 ATM rating makes the Pathfinder suitable for activities such as swimming and exposure to rain when the watch is maintained correctly, but it does not position the watch as a professional saturation or deep-diving instrument. Its primary purpose is navigation and travel rather than underwater diving.
The screw-down crown contributes to the water-resistant construction, but as with any watch, the stated rating depends on the condition of seals and case components. Water resistance should therefore be regarded as a maintained property rather than a permanent guarantee.
Bracelet and Strap Options
The Pathfinder GMT is available in configurations using PVD-coated stainless-steel bracelets and other strap arrangements depending on the specific reference. The documented blue model 109524 is listed with a PVD-coated stainless-steel strap and a 24 mm band width.
The bracelet reinforces the watch’s substantial character and provides a relatively cohesive appearance with the PVD-coated case. For outdoor use, however, some owners may prefer a rubber or textile strap because it can reduce weight and provide easier adjustment.
The 24 mm lug width gives the watch a broad platform for alternative straps. That is useful because a 46 mm outdoor watch can change character significantly depending on whether it is worn on a steel bracelet, rubber strap or NATO-style textile strap.
Everyday Wear
The Pathfinder GMT can function effectively as an everyday watch, particularly for someone who appreciates large, technically oriented watches. The quartz movement keeps ownership relatively straightforward, while the sapphire crystal, 10 ATM water resistance and tritium illumination make the watch practical across a broad range of environments.
Its greatest limitation as an everyday watch is its size. A 46 mm case is substantial, and even though the watch is only around 13 mm thick, it will occupy a significant amount of wrist space.
The design also has a strong outdoor character. The integrated compass ring, large case, PVD finish and tritium display make it clear that this is an instrument-oriented watch rather than a conventional dress or office watch.
Travel Use
The GMT function is where the Pathfinder GMT makes the strongest argument for itself as an everyday travel watch.
A traveler can use the primary display for local time while retaining a second time-zone reference, which is useful when coordinating flights, business calls or family communications across continents. The quartz movement also means that the watch does not need to be kept running like an automatic watch simply to preserve the correct time.
The compass function adds another layer of usefulness for outdoor travel. It does not transform the watch into a complete navigation system, but it provides a directional tool that can be useful when hiking, exploring unfamiliar areas or simply maintaining orientation in an outdoor environment.
Pathfinder GMT vs. Marathon GSAR
The Pathfinder GMT and Marathon GSAR are both excellent examples of serious tritium watches, but they approach the category from very different directions.
The Marathon GSAR is fundamentally a mechanical dive watch with tritium illumination, while the Pathfinder GMT is a quartz travel and outdoor instrument with a GMT function and integrated compass. Their different specifications reflect those distinct priorities.
| Feature | traser P68 Pathfinder GMT | Marathon GSAR |
|---|---|---|
| Primary purpose | Travel / outdoor navigation | Search & rescue / dive |
| Movement | Ronda 515.24H quartz GMT | Sellita SW200-1 automatic |
| Case | PVD stainless steel | 316L stainless steel |
| Diameter | 46 mm | 41 mm |
| Crystal | Sapphire | Sapphire |
| Water resistance | 100 m / 10 ATM | 300 m / 30 ATM |
| Tritium | Yes | Yes |
| Additional lume | Super-LumiNova | MaraGlo |
| GMT | Yes | No |
| Compass | Integrated | No |
| Character | Travel/navigation instrument | Mechanical dive/tool watch |
The comparison illustrates why it is difficult to identify a single “best” tritium watch without considering intended use. Someone who wants a mechanical dive watch and high water resistance will find the GSAR’s specifications more relevant, while someone who travels across time zones and values a compass will find the Pathfinder GMT’s additional functions much more significant.
Strengths and Limitations
| Strengths | Limitations |
|---|---|
| Genuine self-powered tritium illumination | 46 mm case is large |
| Useful GMT function | 10 ATM water resistance is below professional dive-watch levels |
| Integrated compass ring | Compass requires understanding of proper use |
| Anti-reflective sapphire crystal | Quartz movement lacks mechanical character |
| Swiss Ronda GMT movement | PVD coating can show wear if heavily abused |
| Strong low-light readability | Tritium gradually becomes dimmer with age |
| 24-hour and date functions | More visually complex than a simple three-hand watch |
| Distinctive outdoor/travel design | Relatively substantial 125 g bracelet configuration |
Who Is the traser P68 Pathfinder GMT For?
The Pathfinder GMT makes the most sense for someone who wants a large, Swiss-made travel and outdoor watch with genuine tritium illumination. Its combination of GMT, compass, sapphire crystal and self-powered illumination gives it a very different purpose from a conventional field watch or dive watch.
It is particularly well suited to travelers, outdoor enthusiasts and people who regularly work across time zones. The GMT function provides practical value for international travel, while the compass ring adds a useful navigation-oriented feature without requiring electronic power.
The watch is less suitable for someone who wants a compact everyday watch or a conventional mechanical timepiece. Its 46 mm case is a significant commitment, and buyers who primarily value traditional mechanical watchmaking will find the quartz movement less interesting than the Sellita-powered Marathon GSAR.
Is the traser P68 Pathfinder GMT a Good Tritium Watch?
The Pathfinder GMT is one of the more interesting tritium watches because it uses illumination as part of a broader information system. The trigalight tubes provide continuous visibility, while the GMT, compass and 24-hour functions give the wearer useful information that extends beyond simply reading local time.
The combination of trigalight and Super-LumiNova is also a practical design choice. The two technologies have different strengths, and using them together allows the Pathfinder to benefit from the persistent availability of tritium while retaining the stronger initial response of conventional luminous material.
For someone primarily interested in tritium technology, the Pathfinder GMT is particularly valuable because it comes from the company behind the trigalight system itself. That makes the watch not merely a product that happens to use tritium, but an example of how the technology can be integrated into a purpose-built Swiss outdoor watch.
Final Assessment
The traser P68 Pathfinder GMT is a specialized watch with a clear identity. Its 46 mm PVD-coated stainless-steel case, sapphire crystal, Swiss quartz GMT movement, integrated compass ring and 10 ATM water resistance create a package aimed primarily at travel and outdoor use rather than traditional watchmaking.
The tritium illumination is what makes the watch particularly relevant to TritiumLume. traser’s trigalight system provides continuous illumination without requiring exposure to an external light source, and the documented arrangement of green and blue tubes gives the display an additional layer of visual differentiation.
The biggest compromise is size. At 46 mm, the Pathfinder GMT is significantly larger than watches such as the Marathon GSAR, and anyone who prefers compact watches should consider that carefully before buying. The quartz movement is also a functional rather than romantic choice, but that is consistent with a travel instrument where predictable operation and battery life are more important than mechanical complexity.
The watch’s real strength is the way its features work together. The GMT function addresses international travel, the compass ring provides basic directional assistance, sapphire protects the dial, the PVD case gives the watch a low-glare outdoor character, and trigalight ensures that the display remains readable when conventional lume would have faded.
That combination makes the P68 Pathfinder GMT a particularly interesting member of the modern tritium-watch category. It is not simply a tactical watch with glowing markers; it is a purpose-built travel and navigation instrument that uses tritium as one component of a much broader design philosophy.
Frequently Asked Questions
What is the traser P68 Pathfinder GMT?
The P68 Pathfinder GMT is a Swiss-made outdoor and travel watch combining a GMT function, integrated compass ring, trigalight self-powered illumination, sapphire crystal and 10 ATM water resistance. traser currently offers the model in several references and color configurations.
Does the traser P68 Pathfinder GMT use real tritium?
Yes. The watch uses traser’s trigalight self-powered illumination technology, which is based on tritium gas tubes. The published standard GMT specification identifies 13 green tubes and one blue tube, along with four tritium-equipped hands.
What movement does the P68 Pathfinder GMT use?
The documented standard GMT specification uses the Ronda 515.24H GMT quartz movement. It provides the GMT function, date and 24-hour indication, with a stated battery life of up to approximately 45 months.
How large is the traser P68 Pathfinder GMT?
The Pathfinder GMT has a 46 mm case diameter and is approximately 13 mm thick, with a 24 mm lug width. The size gives it substantial wrist presence and is one of the most important characteristics to consider before purchasing.
Does the P68 Pathfinder GMT have a compass?
Yes. The watch has an integrated compass ring operated through a dedicated crown. traser provides a specific compass manual for the P68 Pathfinder family, confirming that the feature is designed as a functional navigation aid.
Is the traser P68 Pathfinder GMT waterproof?
The watch is rated to 10 ATM / 10 bar, equivalent to approximately 100 meters of water resistance. That makes it suitable for many everyday and outdoor activities but places it below the water-resistance level of a professional dive watch such as the Marathon GSAR.
Does the Pathfinder GMT have sapphire crystal?
Yes. The watch uses anti-reflective sapphire crystal, providing strong scratch resistance while helping reduce reflections that could interfere with reading the relatively information-rich dial.
How long does the tritium illumination last?
traser currently states that the trigalight illumination provides a glow for up to approximately 20 years on the P68 Pathfinder GMT. The illumination gradually becomes weaker as the tritium decays rather than suddenly switching off at the end of that period.
Is the traser P68 Pathfinder GMT automatic?
No. The standard P68 Pathfinder GMT uses a Swiss quartz GMT movement. traser also sells automatic Pathfinder models, but those are separate watches with different specifications.
Is the P68 Pathfinder GMT a good travel watch?
Its combination of GMT, compass functionality, sapphire crystal, quartz movement and continuous tritium illumination makes it particularly well suited to travel and outdoor use. The main consideration is its 46 mm case, which is considerably larger than many conventional travel watches.
Is the P68 Pathfinder GMT a dive watch?
No. Although its 10 ATM water resistance provides useful protection for everyday and outdoor activities, the Pathfinder GMT is primarily a travel and navigation watch rather than a dedicated dive watch. Its compass and GMT functions are more central to its design than deep-water capability.
