Side by side

Bremont Supermarine 300MvsSugess Seestern S456 GMT

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

Supermarine 300M
BremontSupermarine 300M
MSRP $3,550
Seestern S456 GMT
SugessSeestern S456 GMT
MSRP $299

At a glance

10 of 29 specs differ
Diameter
Supermarine 300M40mm
Seestern S456 GMT40mm
Power Reserve
Supermarine 300M40h
Seestern S456 GMT40h
Water Resistance
Supermarine 300M300m
Seestern S456 GMT200m
MSRP
Supermarine 300M$3,550
Seestern S456 GMT$299

Full specifications

Case

5 specs
Category
Diver
GMT
Thickness
12mm
13mm
Lug-to-Lug
48.8mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
Dial Color
Green
Blue
Lume
None
Tritium

Movement

2 specs
Caliber
BE-92AE
NH34
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$3,550
$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.

Bremont Supermarine 300M

The Bremont Supermarine 300M is praised for its comfortable 40mm and 42mm case sizes, with owners noting the 42mm wears well on smaller wrists due to its lug design. One owner highlights the 13mm thinness of the 40mm case, considered compact for a 300m diver. The watch is priced at $1375. On balance, owners and reviewers appreciate the Bremont Supermarine 300M for its wearability and compact dimensions, especially for a dive watch.

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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