Side by side

Formex Reef 39.5 mmvsGrand Seiko SBGE285

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
SBGE285
Grand SeikoSBGE285
MSRP $8,900

At a glance

13 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
SBGE28541mm
Power Reserve
Reef 39.5 mm56h
SBGE28572h
Water Resistance
Reef 39.5 mm300m
SBGE285100m
MSRP
Reef 39.5 mm$2,230
SBGE285$8,900

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39.5mm
41mm
Thickness
11mm
13.9mm
Lug-to-Lug
45.5mm
48.3mm
Material
Stainless Steel
Titanium
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
9R66
Type
Automatic
Spring Drive
Power Reserve
56h
72h

Pricing

1 specs
MSRP
$2,230
$8,900

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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 SBGE285

The Grand Seiko SBGE285 is widely praised for its textured dial, high-intensity titanium case with Zaratsu polishing, and Evolution 9 design, which reviewers consider epitomizes modern Grand Seiko. Owners and reviewers highlight its refined yet sporty appearance and lightweight titanium construction, noting it wears smaller than its 41mm dimensions. The 9R66 Spring Drive movement is lauded for its precision, with accuracy reported at ±1 second per day. One owner notes the watch head shows no wear and there are no scratches on the back of the lugs, indicating excellent overall condition. Overall, owners and reviewers rate the Grand Seiko SBGE285 highly for its blend of sophisticated finishing, comfortable wearability, and precise Spring Drive GMT functionality.

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