Side by side

Formex Reef 42 mmvsGrand Seiko SLGW005

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Reef 42 mm
FormexReef 42 mm
MSRP $2,414
SLGW005
Grand SeikoSLGW005
MSRP $9,700

At a glance

12 of 29 specs differ
Diameter
Reef 42 mm42mm
SLGW00538.8mm
Power Reserve
Reef 42 mm56h
SLGW00580h
Water Resistance
Reef 42 mm300m
SLGW00530m
MSRP
Reef 42 mm$2,414
SLGW005$9,700

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
42mm
38.8mm
Thickness
11.4mm
10.4mm
Lug-to-Lug
47mm
43.7mm
Lug Width
22mm
19mm
Water Resistance
300m
30m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
Super-LumiNova
None

Movement

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

Pricing

1 specs
MSRP
$2,414
$9,700

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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 42 mm

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

Grand Seiko SLGW005

The Grand Seiko SLGW005 is lauded for its faithful recreation of the 1968 45GS, featuring a desirable double-signed dial and a beautifully finished case adhering to the Grammar of Design. It is powered by the new 9SA4 manual-winding, high-beat movement, offering an 80-hour power reserve and a mean daily rate of -3/+5 seconds. Owners consider it a "gloriously perfect" and "pure and elegant expression" of Grand Seiko's strengths, with one owner preferring its creamy dial over a more pronounced beige found on other models. Overall, owners and reviewers rate the Grand Seiko SLGW005 highly for its elegant design and impressive high-beat movement.

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