Side by side

Formex Reef GMTvsSeiko Prospex Land Mechanical GMT

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

Reef GMT
FormexReef GMT
MSRP $2,235
Prospex Land Mechanical GMT
SeikoProspex Land Mechanical GMT
MSRP $1,150

At a glance

12 of 29 specs differ
Diameter
Reef GMT42mm
Prospex Land Mechanical GMT39.5mm
Power Reserve
Reef GMT56h
Prospex Land Mechanical GMT72h
Water Resistance
Reef GMT300m
Prospex Land Mechanical GMT200m
MSRP
Reef GMT$2,235
Prospex Land Mechanical GMT$1,150

Full specifications

Case

5 specs
Diameter
42mm
39.5mm
Thickness
11.4mm
13.6mm
Lug-to-Lug
47mm
46.4mm
Lug Width
22mm
20mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
Super-LumiNova
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Sellita SW330-2
6R54
Power Reserve
56h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,235
$1,150

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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.

Seiko Prospex Land Mechanical GMT

Owners widely praise the Seiko Prospex Land Mechanical GMT for its faithful reconstruction of a classic design, comfortable bracelet, and attractive gray dial with a bubbly crystal. Reviewers highlight its handsome everyday sports watch appeal, solid specifications, and classic Seiko diver aesthetics, offering great value. However, community members are divided on the 6R movement's accuracy, with some reporting significant deviations even after regulation, while others find it competitive for the price. A point of contention is the GMT function, with some wishing for a "flyer" style local jump GMT instead of the "caller" type, and the internal compass bezel is described as finicky and difficult to read. Owners generally consider the Seiko Prospex Land Mechanical GMT overpriced at its retail price, suggesting better value is found on sale or closer to $700.

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