Side by side
Jack Mason Strat-o-timer GMTvsSpinnaker Spence 300
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
9 of 29 specs differDiameter
Strat-o-timer GMT42mm
Spence 30040mm
Power Reserve
Strat-o-timer GMT40h
Spence 30040h
Water Resistance
Strat-o-timer GMT200m
Spence 300300m
MSRP
Strat-o-timer GMT$1,149
Spence 300$650
Full specifications
Case
6 specsCategory
—
Diver
Diameter
42mm
40mm
Thickness
13.2mm
11.5mm
Lug-to-Lug
49mm
48mm
Lug Width
22mm
20mm
Water Resistance
200m
300m
Crystal & Dial
1 specsDial Color
—
Aquamarine
Movement
1 specsCaliber
Miyota 9075
SII NH35A
Pricing
1 specsMSRP
$1,149
$650
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