Ulysse Nardin San Marco GMT ± Big DatevsYema Superman Heritage GMT Bronze

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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.

San Marco GMT ± Big Date

Superman Heritage GMT Bronze
Diameter
40mm
39mm
Thickness
11.8mm
11.7mm
lowest
Water Resistance
100m
300m
highest
Power Reserve
42h
n/a
MSRP
n/a
$1,499
Movement
UN-22
Automatic
Case
7 specsCrystal & Dial
3 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Ulysse Nardin San Marco GMT ± Big Date for its exceptional reliability and build quality, with one owner reporting twelve years of service comparable to Rolex and JLC. Reviewers and owners consistently highlight its superb accuracy, with figures as precise as ±1 second per day, and its practical GMT functionality for travelers. The watch's design is described as having just enough eccentricity to be interesting, featuring good legibility and great finishing, though some find its aesthetic dated. The 40mm case is noted to wear well, and the movement is praised for its in-house components and silicon parts. Overall, owners and reviewers rate the Ulysse Nardin San Marco GMT ± Big Date highly for its enduring reliability and precise timekeeping.
Owners praise the Yema Superman Heritage GMT Bronze for its comfortable 39mm wearability and firm 120-click bezel, with one forum user noting the in-house YEMA3000 movement. Reviewers highlight its exceptional value, with prices cited around €700-€750, featuring gilt markers and a gradient dial that impresses even under magnification. The bronze case, bezel, lock, and crown create a clean aesthetic, and the vintage leather strap is exceptionally soft and comfortable. Some owners may prefer a ceramic insert over aluminum, and one reviewer found the blue model's sapphire bezel and strap combination to be slightly off. Accuracy has been reported around -3 seconds per day with an early in-house movement, and while the bezel lock adds character, one reviewer noted it may not sit perfectly centered. Overall, owners and reviewers rate the Yema Superman Heritage GMT Bronze highly for its impressive aesthetic and exceptional value at the price point.
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