Side by side

Formex Reef 39.5 mmvsGrand Seiko SLGW003

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
SLGW003
Grand SeikoSLGW003
MSRP $11,600

At a glance

14 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
SLGW00338.6mm
Power Reserve
Reef 39.5 mm56h
SLGW00380h
Water Resistance
Reef 39.5 mm300m
SLGW00330m
MSRP
Reef 39.5 mm$2,230
SLGW003$11,600

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
39.5mm
38.6mm
Thickness
11mm
9.95mm
Lug-to-Lug
45.5mm
45mm
Lug Width
22mm
20mm
Material
Stainless Steel
Titanium
Water Resistance
300m
30m

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
Bahama Blue
Black
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
Sellita SW300-1
9SA4
Type
Automatic
Manual
Power Reserve
56h
80h

Pricing

1 specs
MSRP
$2,230
$11,600

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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.

Grand Seiko SLGW003

The Grand Seiko SLGW003 is praised for its comfortable, lightweight Brilliant Hard Titanium case, meticulous finishing, and a clean, modern dial. Reviewers highlight the new 9SA4 manual-wind movement, noting its attractive finishing, 80-hour power reserve, and accuracy of -3/+5 seconds per day. It is considered a versatile dress watch blending vintage and future Grand Seiko spirit. The €11,700 price is noted as expensive, with some questioning its value. Overall, reviewers rate the Grand Seiko SLGW003 highly for its elegant design and impressive manual-wind movement at its flagship price point.

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