Side by side

Formex Reef 39.5 mmvsGrand Seiko SBGJ259

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
SBGJ259
Grand SeikoSBGJ259
MSRP $7,700

At a glance

12 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
SBGJ25940mm
Power Reserve
Reef 39.5 mm56h
SBGJ25955h
Water Resistance
Reef 39.5 mm300m
SBGJ259100m
MSRP
Reef 39.5 mm$2,230
SBGJ259$7,700

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39.5mm
40mm
Thickness
11mm
14mm
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

2 specs
Caliber
Sellita SW300-1
9S86
Power Reserve
56h
55h

Pricing

1 specs
MSRP
$2,230
$7,700

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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 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 SBGJ259

The Grand Seiko SBGJ259 "Urban Bamboo" is admired for its striking green dial, though one owner notes its color appears more yellow in person than in promotional photos. It is considered a dressier piece compared to other models. On balance, owners appreciate the Grand Seiko SBGJ259 for its unique dial color and dressy aesthetic.

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