Side by side

Formex Reef 39.5 mmvsGrand Seiko SBGV239

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
SBGV239
Grand SeikoSBGV239
MSRP $3,100

At a glance

13 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
SBGV23940mm
Power Reserve
Reef 39.5 mm56h
SBGV23940h
Water Resistance
Reef 39.5 mm300m
SBGV239100m
MSRP
Reef 39.5 mm$2,230
SBGV239$3,100

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39.5mm
40mm
Thickness
11mm
10.4mm
Lug-to-Lug
45.5mm
46.2mm
Lug Width
22mm
19mm
Water Resistance
300m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW300-1
9F82
Type
Automatic
Quartz
Power Reserve
56h
40h

Pricing

1 specs
MSRP
$2,230
$3,100

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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 SBGV239

The Grand Seiko SBGV239 is widely praised for its superb timekeeping from the 9F Quartz movement and its excellent finishing, which exceeds expectations. Owners highlight the dial's ability to pop even in poor lighting and its deep blue color that can appear black. The watch's 40mm diameter is also frequently cited as a positive attribute for wearability. Overall, owners rate the Grand Seiko SBGV239 highly for its exceptional finishing and the precise timekeeping of its 9F Quartz movement.

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