Side by side

Formex Reef 39.5 mmvsStudio Underd0g Mint Choc Chip (Gen3)

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
Mint Choc Chip (Gen3)
Studio Underd0gMint Choc Chip (Gen3)
MSRP $550

At a glance

11 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Mint Choc Chip (Gen3)38.5mm
Power Reserve
Reef 39.5 mm56h
Mint Choc Chip (Gen3)40h
Water Resistance
Reef 39.5 mm300m
Mint Choc Chip (Gen3)
MSRP
Reef 39.5 mm$2,230
Mint Choc Chip (Gen3)$550

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
39.5mm
38.5mm
Thickness
11mm
Lug-to-Lug
45.5mm
Lug Width
22mm
Water Resistance
300m

Crystal & Dial

2 specs
Dial Color
Bahama Blue
Standard
Lume
Super-LumiNova
None

Movement

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

Pricing

1 specs
MSRP
$2,230
$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 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.

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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