Side by side

Jack Mason Strat-o-timer GMTvsSpinnaker Dumas GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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Strat-o-timer GMT
Jack MasonStrat-o-timer GMT
MSRP $1,149
Dumas GMT
SpinnakerDumas GMT
MSRP $399
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Buy from Spinnaker ↗
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At a glance

8 of 29 specs differ
Diameter
Strat-o-timer GMT42mm
Dumas GMT44mm
Power Reserve
Strat-o-timer GMT40h
Dumas GMT40h
Water Resistance
Strat-o-timer GMT200m
Dumas GMT300m
MSRP
Strat-o-timer GMT$1,149
Dumas GMT$399

Full specifications

Case

5 specs
Category
—
GMT
Diameter
42mm
44mm
Thickness
13.2mm
15mm
Lug-to-Lug
49mm
48mm
Water Resistance
200m
300m

Crystal & Dial

1 specs
Dial Color
—
Blue

Movement

1 specs
Caliber
Miyota 9075
Seiko NH34A

Pricing

1 specs
MSRP
$1,149
$399
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