Side by side

Jack Mason Strat-o-timer GMTvsGrand Seiko SBGM221

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
SBGM221
Grand SeikoSBGM221
MSRP $5,400
Buy from Jack Mason ↗
Buy used on eBay ↗
Buy from Grand Seiko ↗
Buy used on eBay ↗

At a glance

12 of 29 specs differ
Diameter
Strat-o-timer GMT42mm
SBGM22139.5mm
Power Reserve
Strat-o-timer GMT40h
SBGM22172h
Water Resistance
Strat-o-timer GMT200m
SBGM22130m
MSRP
Strat-o-timer GMT$1,149
SBGM221$5,400

Full specifications

Case

7 specs
Category
—
GMT
Diameter
42mm
39.5mm
Thickness
13.2mm
13.7mm
Lug-to-Lug
49mm
46.9mm
Lug Width
22mm
19mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
30m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
—
Black

Movement

2 specs
Caliber
Miyota 9075
9S66
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$1,149
$5,400
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Jack Mason Strat-o-timer GMTvsGrand Seiko SBGM221Duckworth Prestex Rivington GMT AutomaticvsGrand Seiko SBGM221Duckworth Prestex Rivington GMT Special EditionvsGrand Seiko SBGM221Nadir Vespera GMTvsGrand Seiko SBGM221Jack Mason Strat-o-timer GMTvsanOrdain Model 2 PorcelainanOrdain Fabrik GMTvsJack Mason Strat-o-timer GMT
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