AVI-8 Flyboy Airmaster GMT AutomaticvsYema 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.

Flyboy Airmaster GMT Automatic

Superman Worldtime GMT
Diameter
40mm
39mm
Water Resistance
50m
300m
highest
MSRP
$345
lowest
$1,549
Movement
Seiko NH34
Automatic
Case
4 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 AVI-8 Flyboy Airmaster GMT Automatic for its unique aviator style, robust build, and crisp dial texture, with one owner noting a complex three-timezone function. The watch is considered fun and wearable with solid dimensions, though some find the dial busy and difficult to read, and the stock strap is noted as cheap with limited lug hole options. Some owners question the quality relative to price, while others acknowledge that AVI-8 watches, often featuring Seiko NH34 movements, are generally considered decent for their $100-$200 price point. On balance, owners rate the AVI-8 Flyboy Airmaster GMT Automatic well for its standout aviator design and value at the price.
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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