Side by side

Formex Reef 39.5 mmvsSeiko Presage Classic Series

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
Presage Classic Series
SeikoPresage Classic Series
MSRP $950

At a glance

14 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Presage Classic Series40.2mm
Power Reserve
Reef 39.5 mm56h
Presage Classic Series72h
Water Resistance
Reef 39.5 mm300m
Presage Classic Series100m
MSRP
Reef 39.5 mm$2,230
Presage Classic Series$950

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39.5mm
40.2mm
Thickness
11mm
13mm
Lug-to-Lug
45.5mm
46mm
Lug Width
22mm
20mm
Water Resistance
300m
100m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Bahama Blue
Black
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW300-1
6R55
Power Reserve
56h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,230
$950

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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 Presage Classic Series

The Seiko Presage Classic Series is widely praised for its sublime dial and hand finishing, with textured dials inspired by Japanese silk fabrics and aesthetically pleasing curved hands. Owners and reviewers highlight the clean dials with applied indices and the robust elegance of the watches, noting the comfortable wearability of the cases, particularly the 36mm variants, and the practical 100m water resistance. The 6R movements provide a 72-hour power reserve, a notable improvement for the price point. However, the pin and collar bracelet system is criticized by one owner as subpar for the cost, and the quoted accuracy of the 6R55 movement is -15/+25 seconds per day, though one forum user reports better performance. The exhibition caseback's finish is described as entry-industrial, and the open-heart and 24-hour subdial configurations may not appeal to all.

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