Certina DS-X GMTvsMarathon TSAR (Tritium Search & Rescue) Diver's Quartz
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

DS-X GMT

TSAR (Tritium Search & Rescue) Diver's Quartz
Diameter
41.2mm
46mm
Lug-to-Lug
48.6mm
48mm
lowest
Thickness
12.2mm
lowest
14mm
Water Resistance
200m
300m
highest
MSRP
$643
lowest
$1,550
Movement
F06.865
Swiss High-Torque Quartz
Case
5 specsCrystal & Dial
1 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Certina DS-X GMT for its functional GMT complication, rugged build, and value, with one owner noting its $269 price as a good deal for the well-made quality. Reviewers highlight its vibrant, fun design as a departure from typical offerings, and its practical dual-bezel system. Some owners find the quartz movement a no-brainer for accuracy and lower cost, while others prefer automatics and note the MSRP can be high. The inner 24-hour bezel's 90-click action is criticized for misalignment, and lume is described as functional but not exceptionally bright. One owner reports the bracelet clasp rattles. Overall, owners and reviewers rate the Certina DS-X GMT highly for its functional GMT complication and value at its price point.
Marathon TSAR (Tritium Search & Rescue) Diver's Quartz owners widely praise its high quality, extreme legibility, and bright tritium tubes that glow without needing to charge. The simple, functional dial layout and ISO 6425 certification are also noted strengths. One owner reports owning a TSAR for nearly 15 years with no problems and found Marathon's service experience to be great. Some owners mention the 41mm TSAR wears small and has a field watch aesthetic, while others note the crown can dig into the wrist. The tritium tubes in the hands provide excellent brightness in the dark. On balance, owners rate the Marathon TSAR (Tritium Search & Rescue) Diver's Quartz highly for its exceptional tritium lume and robust, legible design.
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