Side by side

Formex Reef 39.5 mmvsSeiko Presage Classic Series “Craftsmanship” Enamel Dial

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

At a glance

14 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Presage Classic Series “Craftsmanship” Enamel Dial40.2mm
Power Reserve
Reef 39.5 mm56h
Presage Classic Series “Craftsmanship” Enamel Dial72h
Water Resistance
Reef 39.5 mm300m
Presage Classic Series “Craftsmanship” Enamel Dial100m
MSRP
Reef 39.5 mm$2,230
Presage Classic Series “Craftsmanship” Enamel Dial$1,400

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39.5mm
40.2mm
Thickness
11mm
12.1mm
Lug-to-Lug
45.5mm
48mm
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
6R5H
Power Reserve
56h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,230
$1,400

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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 “Craftsmanship” Enamel Dial

Owners and reviewers widely praise the Seiko Presage Classic Series “Craftsmanship” Enamel Dial for its high-quality, handcrafted enamel dials, with specific commendations for the depth and subtle gloss of urushi lacquer and the excellent legibility of minimalistic markers and contrasting hands. The watches are frequently cited as offering significant value, with one reviewer noting the SPB163 as a great value at €1,300, and another highlighting the series' impressive 100M water resistance and Japanese design inspiration at $1,300 USD. However, the 12.4mm to 12.8mm thickness is noted by multiple sources as a potential area for improvement, with a preference for under 12mm, and one owner dislikes the date window. Accuracy figures for the 6R27 movement range from -15 to +25 seconds per day, and its power reserve is closer to 35-40 hours than the advertised 45 hours.

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