Jack Mason Strat-o-timer GMTvsYema Superman Worldtime GMT
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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.
Strat-o-timer GMT
Superman Worldtime GMT
Diameter
42mm
39mm
Lug-to-Lug
49mm
n/a
Thickness
13.2mm
n/a
Water Resistance
200m
300m
highest
Power Reserve
42h
n/a
MSRP
$1,149
lowest
$1,549
Movement
Miyota 9075
Automatic
Case
6 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Jack Mason Strat-o-timer GMT for its exceptional value and traveler GMT functionality, citing the Miyota 9075 movement and impressive fit and finish, including screw-in bracelet pins, on-the-fly adjustment, sapphire crystal front and back, and a screw-down crown. The 7-link bracelet is frequently highlighted as a standout feature, with one owner calling it the best they have worn. Some reviewers note "chubby" hour markers and a bezel insert that one owner perceived as plastic, though another stated it is sapphire. Overall, owners rate the Jack Mason Strat-o-timer GMT highly for its impressive build quality and traveler GMT complication at its price point.
The Miyota 9075 true GMT movement is a consensus strength. The lume on the hands, dial, and bezel is also a shared positive feature. Reviewers did not reach a consensus on any weaknesses or points of disagreement.
The Yema Superman Worldtime GMT is praised for its comfortable 39mm wearability and a unique bezel-lock mechanism, with owners appreciating its premium feel and domed crystal. However, some find the aluminum bezel insert less desirable than ceramic and report a stiff bracelet clasp, with one owner noting inconsistent quality control and poor customer service. Overall, owners rate the Yema Superman Worldtime GMT highly for its comfortable 39mm wearability and unique bezel-lock mechanism, despite occasional issues with the bracelet clasp and quality control.
The "Coke" bezel and maxi dial are attractive design elements. The in-house automatic GMT movement is a French alternative to pricier GMTs.
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