Side by side
Bremont Supermarine 300MvsSheffield 1A diver ~40mm 3-hand, Arabic numerals (12/3/6/9), no date
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
9 of 29 specs differDiameter
Supermarine 300M40mm
1A diver ~40mm 3-hand, Arabic numerals (12/3/6/9), no date40mm
Power Reserve
Supermarine 300M40h
1A diver ~40mm 3-hand, Arabic numerals (12/3/6/9), no date—
Water Resistance
Supermarine 300M300m
1A diver ~40mm 3-hand, Arabic numerals (12/3/6/9), no date200m
MSRP
Supermarine 300M$3,550
1A diver ~40mm 3-hand, Arabic numerals (12/3/6/9), no date$238
Full specifications
Case
4 specsThickness
12mm
12.8mm
Lug-to-Lug
—
46mm
Material
904L Stainless Steel
Stainless Steel
Water Resistance
300m
200m
Crystal & Dial
2 specsDial Color
Green
White/Blue
Lume
None
Swiss blue lume
Movement
2 specsCaliber
BE-92AE
Seiko NH35A
Power Reserve
40h
—
Pricing
1 specsMSRP
$3,550
$238
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