Side by side

Formex Reef 39.5 mmvsZelos GT

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
GT
ZelosGT
MSRP $499

At a glance

11 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
GT42mm
Power Reserve
Reef 39.5 mm56h
GT40h
Water Resistance
Reef 39.5 mm300m
GT100m
MSRP
Reef 39.5 mm$2,230
GT$499

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
39.5mm
42mm
Thickness
11mm
10.8mm
Lug-to-Lug
45.5mm
42mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Bahama Blue
SS - Azzurro
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW300-1
Miyota 9133
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$499

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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.

Zelos GT

The Zelos GT is lauded for its value and bold design, with owners highlighting the cool power reserve meter and superb 3-point micro-adjust bracelet. Some owners find the case and lugs could hug the wrist better, and the bracelet is noted as being quite long, requiring significant link removal for a 7.1-inch wrist. The dark green dial, while inspired by Lamborghini, is described as appearing mostly black. Overall, owners rate the Zelos GT highly for its value and the quality of its bracelet at the price point.

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