Side by side

Formex Reef 39.5 mmvsZelos Thresher 41 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
Thresher 41 GMT
ZelosThresher 41 GMT
MSRP $729

At a glance

13 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Thresher 41 GMT41mm
Power Reserve
Reef 39.5 mm56h
Thresher 41 GMT40h
Water Resistance
Reef 39.5 mm300m
Thresher 41 GMT200m
MSRP
Reef 39.5 mm$2,230
Thresher 41 GMT$729

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
39.5mm
41mm
Thickness
11mm
11.5mm
Lug-to-Lug
45.5mm
41mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Bahama Blue
Damascus LE
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW300-1
Miyota 9075 GMT
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$729

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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 Thresher 41 GMT

Owners widely praise the Zelos Thresher 41 GMT for its creative design, titanium construction, and excellent lume. Some find the worldtimer bezel busy and the GMT function less easy to read, while others note the double Mother of Pearl dial's dynamic color shifts can be reflective in direct sun. The bezel-based world timer requires manual adjustment and allows for independent GMT use. Overall, owners rate the Zelos Thresher 41 GMT highly for its unique titanium build and striking dial at its price point.

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