Side by side
Baltic Hermétique SummervsJack Mason Strat-o-timer GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Hermétique Summer37mm
Strat-o-timer GMT42mm
Power Reserve
Hermétique Summer42h
Strat-o-timer GMT40h
Water Resistance
Hermétique Summer150m
Strat-o-timer GMT200m
MSRP
Hermétique Summer$594
Strat-o-timer GMT$1,149
Full specifications
Case
7 specsCategory
Dress
—
Diameter
37mm
42mm
Thickness
10.8mm
13.2mm
Lug-to-Lug
46mm
49mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
150m
200m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Orange
—
Lume
BGW9
None
Movement
2 specsCaliber
Miyota 9039
Miyota 9075
Power Reserve
42h
40h
Pricing
1 specsMSRP
$594
$1,149
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