Side by side
Jack Mason Strat-o-timer GMTvsSpinnaker Challenger Automatic
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
6 of 29 specs differDiameter
Strat-o-timer GMT42mm
Challenger Automatic42mm
Power Reserve
Strat-o-timer GMT40h
Challenger Automatic40h
Water Resistance
Strat-o-timer GMT200m
Challenger Automatic200m
MSRP
Strat-o-timer GMT$1,149
Challenger Automatic$289
Full specifications
Case
3 specsCategory
—
Diver
Thickness
13.2mm
19mm
Lug-to-Lug
49mm
49.5mm
Crystal & Dial
1 specsDial Color
—
Blue
Movement
1 specsCaliber
Miyota 9075
SII NH35A
Pricing
1 specsMSRP
$1,149
$289
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