Side by side

Formex Reef 39.5 mmvsSeiko Coutura

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
Coutura
SeikoCoutura
MSRP $625

At a glance

13 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Coutura45.3mm
Power Reserve
Reef 39.5 mm56h
Coutura40h
Water Resistance
Reef 39.5 mm300m
Coutura100m
MSRP
Reef 39.5 mm$2,230
Coutura$625

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39.5mm
45.3mm
Thickness
11mm
11.5mm
Lug-to-Lug
45.5mm
46mm
Lug Width
22mm
12mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Bahama Blue
Black
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW300-1
8B92
Type
Automatic
Quartz
Power Reserve
56h
40h
Jewels
25
10

Pricing

1 specs
MSRP
$2,230
$625

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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.

Seiko Coutura

Owners widely report the Seiko Coutura's metal treatments are very wear-resistant, with one owner noting minimal scratching after six years. Reviewers and owners appreciate its solar-powered movement, perpetual calendar, and radio sync features, with some finding its unique, futuristic styling captivating and a great value, while others describe the dial as too busy or gaudy. Some owners find the watch large and complicated to set initially, and one owner experienced issues with the solar power reserve requiring constant light exposure. On balance, owners and reviewers rate the Seiko Coutura well for its durable construction and practical solar and perpetual calendar features, despite polarizing design opinions.

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