Side by side
Bremont Supermarine 300MvsMaystone Watch Co Prosperity GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Supermarine 300M40mm
Prosperity GMT38mm
Power Reserve
Supermarine 300M40h
Prosperity GMT41h
Water Resistance
Supermarine 300M300m
Prosperity GMT100m
MSRP
Supermarine 300M$3,550
Prosperity GMT$443
Full specifications
Case
6 specsCategory
Diver
—
Diameter
40mm
38mm
Thickness
12mm
11.9mm
Lug-to-Lug
—
46mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
100m
Crystal & Dial
2 specsDial Color
Green
Red
Lume
None
string
Movement
2 specsCaliber
BE-92AE
Seiko NH34
Power Reserve
40h
41h
Pricing
1 specsMSRP
$3,550
—
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