Side by side

Formex Reef 39.5 mmvsGrand Seiko SLGW007

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
SLGW007
Grand SeikoSLGW007
MSRP $10,000

At a glance

13 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
SLGW00738.6mm
Power Reserve
Reef 39.5 mm56h
SLGW00780h
Water Resistance
Reef 39.5 mm300m
SLGW00730m
MSRP
Reef 39.5 mm$2,230
SLGW007$10,000

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39.5mm
38.6mm
Thickness
11mm
9.95mm
Lug-to-Lug
45.5mm
45mm
Lug Width
22mm
20mm
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
$10,000

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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 SLGW007

Grand Seiko SLGW007 owners and reviewers praise its compact 38.6mm x 9.95mm Evolution 9 case and the textured "Moonlit Birch" dial, described as moody, elegant, and captivating. The technically credible 9SA4 hand-wound movement with an 80-hour power reserve is also highlighted. Its 30m water resistance and lack of lume are noted as appropriate for a dress watch. Overall, owners and reviewers rate the Grand Seiko SLGW007 highly for its refined case, captivating dial, and updated movement.

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