Side by side

Formex Reef GMTvsSugess Seestern S446 GMT

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

Reef GMT
FormexReef GMT
MSRP $2,235
Seestern S446 GMT
SugessSeestern S446 GMT
MSRP $269

At a glance

10 of 29 specs differ
Diameter
Reef GMT42mm
Seestern S446 GMT40mm
Power Reserve
Reef GMT56h
Seestern S446 GMT41h
Water Resistance
Reef GMT300m
Seestern S446 GMT100m
MSRP
Reef GMT$2,235
Seestern S446 GMT$269

Full specifications

Case

4 specs
Diameter
42mm
40mm
Thickness
11.4mm
10mm
Lug Width
22mm
19mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Lume
Super-LumiNova
Tritium

Movement

4 specs
Caliber
Sellita SW330-2
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
56h
41h
Complications
None
GMT, Moonphase, Date

Pricing

1 specs
MSRP
$2,235
$269

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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.

Sugess Seestern S446 GMT

Owners widely praise the Sugess Seestern S446 GMT for its outstanding finishing and materials at its price point, with specific mentions of the cream or ivory dial, polished hands, and clear crystal offering superb legibility. Accuracy is generally good, with one owner reporting +2/3 seconds per day from the Seiko NH34A movement. Some owners find the lume is not a strong point, and the bracelet clasp could benefit from more micro-adjustment, with screw pins noted as cheap. The GMT hand is described as flat by some, and opinions are split on the "Sugess" versus "Seestern" logo. Overall, owners rate the Sugess Seestern S446 GMT highly for its beautiful dial and excellent build quality for the price.

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