Side by side

Formex Reef 39.5 mmvsYema Superman Worldtime GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230
Superman Worldtime GMT
YemaSuperman Worldtime GMT
MSRP $1,549

At a glance

10 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Superman Worldtime GMT39mm
Power Reserve
Reef 39.5 mm56h
Superman Worldtime GMT40h
Water Resistance
Reef 39.5 mm300m
Superman Worldtime GMT300m
MSRP
Reef 39.5 mm$2,230
Superman Worldtime GMT$1,549

Full specifications

Case

5 specs
Category
Diver
GMT
Diameter
39.5mm
39mm
Thickness
11mm
Lug-to-Lug
45.5mm
Lug Width
22mm
20mm

Crystal & Dial

2 specs
Dial Color
Bahama Blue
39mm Automatic
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW300-1
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$1,549

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

Yema Superman Worldtime GMT

Owners widely praise the Yema Superman Worldtime GMT for its premium feel, unique bezel-lock mechanism, and attractive domed crystal. Some owners note the aluminum bezel insert is less desirable than ceramic and report the bracelet clasp can be stiff or difficult to open. Inconsistent quality control and poor customer service have been flagged by some owners. On balance, owners value the Yema Superman Worldtime GMT for its distinctive features and comfortable wearability.

From video reviewers

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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