Side by side

Formex Reef GMTvsGrand Seiko SBGJ259

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

Reef GMT
FormexReef GMT
MSRP $2,235
SBGJ259
Grand SeikoSBGJ259
MSRP $7,700

At a glance

10 of 29 specs differ
Diameter
Reef GMT42mm
SBGJ25940mm
Power Reserve
Reef GMT56h
SBGJ25955h
Water Resistance
Reef GMT300m
SBGJ259100m
MSRP
Reef GMT$2,235
SBGJ259$7,700

Full specifications

Case

5 specs
Diameter
42mm
40mm
Thickness
11.4mm
14mm
Lug-to-Lug
47mm
46.2mm
Lug Width
22mm
19mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW330-2
9S86
Power Reserve
56h
55h

Pricing

1 specs
MSRP
$2,235
$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 GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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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