Side by side

Formex Reef 39.5 mmvsSugess Seestern S456 GMT

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
Seestern S456 GMT
SugessSeestern S456 GMT
MSRP $299

At a glance

12 of 29 specs differ
Diameter
Reef 39.5 mm39.5mm
Seestern S456 GMT40mm
Power Reserve
Reef 39.5 mm56h
Seestern S456 GMT40h
Water Resistance
Reef 39.5 mm300m
Seestern S456 GMT200m
MSRP
Reef 39.5 mm$2,230
Seestern S456 GMT$299

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39.5mm
40mm
Thickness
11mm
13mm
Lug-to-Lug
45.5mm
48.8mm
Lug Width
22mm
20mm
Water Resistance
300m
200m

Crystal & Dial

2 specs
Dial Color
Bahama Blue
Blue
Lume
Super-LumiNova
Tritium

Movement

3 specs
Caliber
Sellita SW300-1
NH34
Power Reserve
56h
40h
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$2,230
$299

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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.

Sugess Seestern S456 GMT

Owners widely praise the Sugess Seestern S456 GMT for its excellent case finishing, deep blue sunburst dial, and crisp indices, with one owner rating the overall fit and finish 9.5 out of 10. The watch is noted for its legibility, strong lume that lasts about 4 hours, and accurate timekeeping around -4 seconds per day, with easy GMT hand adjustment. Some owners report issues with a loose or friction-based unidirectional bezel, while others find theirs tight and prefer a bidirectional GMT bezel. The sapphire crystal is described as clear and flat by some, but others find it very reflective with AR coating that could be improved. Sizing is generally considered good at 39mm with a 46mm lug-to-lug and 12mm thickness, though one owner expresses concern about its 49mm lug-to-lug and 41mm bezel diameter. Overall, owners rate the Sugess Seestern S456 GMT highly for its impressive finishing and dial at its price point.

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