Side by side

Formex Reef GMTvsStudio Underd0g Mint Choc Chip (Gen3)

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

Reef GMT
FormexReef GMT
MSRP $2,235
Mint Choc Chip (Gen3)
Studio Underd0gMint Choc Chip (Gen3)
MSRP $550

At a glance

11 of 29 specs differ
Diameter
Reef GMT42mm
Mint Choc Chip (Gen3)38.5mm
Power Reserve
Reef GMT56h
Mint Choc Chip (Gen3)40h
Water Resistance
Reef GMT300m
Mint Choc Chip (Gen3)
MSRP
Reef GMT$2,235
Mint Choc Chip (Gen3)$550

Full specifications

Case

6 specs
Category
GMT
Chronograph
Diameter
42mm
38.5mm
Thickness
11.4mm
Lug-to-Lug
47mm
Lug Width
22mm
Water Resistance
300m

Crystal & Dial

2 specs
Dial Color
Black
Standard
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW330-2
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,235
$550

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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.

Studio Underd0g Mint Choc Chip (Gen3)

Owners and reviewers praise the Studio Underd0g Mint Choc Chip (Gen3) for its unique, visually striking design, featuring an asymmetrical dial, textured two-tone finish, orange chrono hand tips, and chocolate chip hour markers, all housed in a comfortable 38.5mm case with a hand-winding SeaGull ST-1901 movement and a goat-skin strap. Some owners, however, find the watch overpriced for its movement and dial quality, and a few feel it appears toy-like on larger wrists. Overall, owners and reviewers value the Studio Underd0g Mint Choc Chip (Gen3) for its distinctive aesthetic and comfortable wear, despite some reservations about price and perceived scale.

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