Side by side
Jack Mason Strat-o-timer GMTvsHelgray Poseidon Diver (Automatic)
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
8 of 29 specs differDiameter
Strat-o-timer GMT40mm
Poseidon Diver (Automatic)40mm
Power Reserve
Strat-o-timer GMT42h
Poseidon Diver (Automatic)40h
Water Resistance
Strat-o-timer GMT200m
Poseidon Diver (Automatic)300m
MSRP
Strat-o-timer GMT$1,099
Poseidon Diver (Automatic)$249
Full specifications
Case
4 specsCategory
—
Diver
Thickness
13.2mm
12mm
Lug-to-Lug
47mm
46mm
Water Resistance
200m
300m
Crystal & Dial
1 specsDial Color
—
Black
Movement
2 specsCaliber
Miyota 9075
NH35 Warranty
Power Reserve
42h
40h
Pricing
1 specsMSRP
$1,099
$249
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