Side by side

Formex Reef GMTvsYema Wristmaster Slim Small Seconds CMM.29

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

Reef GMT
FormexReef GMT
MSRP $2,235
Wristmaster Slim Small Seconds CMM.29
YemaWristmaster Slim Small Seconds CMM.29
MSRP $2,249

At a glance

10 of 29 specs differ
Diameter
Reef GMT42mm
Wristmaster Slim Small Seconds CMM.2939mm
Power Reserve
Reef GMT56h
Wristmaster Slim Small Seconds CMM.2940h
Water Resistance
Reef GMT300m
Wristmaster Slim Small Seconds CMM.29100m
MSRP
Reef GMT$2,235
Wristmaster Slim Small Seconds CMM.29$2,249

Full specifications

Case

6 specs
Category
GMT
Dress
Diameter
42mm
39mm
Thickness
11.4mm
9mm
Lug-to-Lug
47mm
Lug Width
22mm
20mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW330-2
Yema CMM.29
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,235
$2,249

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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 GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

Yema Wristmaster Slim Small Seconds CMM.29

Owners widely praise the Yema Wristmaster Slim Small Seconds CMM.29 for its slim 9.5mm case, unique nature-inspired dial, and brushed steel finish. The micro-rotor movement is noted for its 4Hz beat rate and 42-hour power reserve, regulated to -/+ 10 seconds per day. Some owners report concerns regarding the movement and warranty process, while a reviewer questioned the value proposition at its price point and noted minor finishing inconsistencies on a prototype. On balance, the Yema Wristmaster Slim Small Seconds CMM.29 is highly regarded by owners for its distinctive design and comfortable wearability.

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