Side by side
Jack Mason Strat-o-timer GMTvsSeiko 5 Sports Field series
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Strat-o-timer GMT40mm
5 Sports Field series39.4mm
Power Reserve
Strat-o-timer GMT42h
5 Sports Field series41h
Water Resistance
Strat-o-timer GMT200m
5 Sports Field series100m
MSRP
Strat-o-timer GMT$1,099
5 Sports Field series$315
Full specifications
Case
4 specsCategory
—
Sport
Diameter
40mm
39.4mm
Lug-to-Lug
47mm
48.1mm
Water Resistance
200m
100m
Crystal & Dial
4 specsCrystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
Dial Color
—
Black
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Miyota 9075
4R36
Power Reserve
42h
41h
Jewels
25
24
Pricing
1 specsMSRP
$1,099
$315
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