Side by side

Grand Seiko SBGD223vsSpinnaker Dumas GMT

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

SBGD223
Grand SeikoSBGD223
MSRP $320,000
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

13 of 29 specs differ
Diameter
SBGD22344.5mm
Dumas GMT44mm
Power Reserve
SBGD223192h
Dumas GMT40h
Water Resistance
SBGD223100m
Dumas GMT300m
MSRP
SBGD223$320,000
Dumas GMT$399

Full specifications

Case

7 specs
Category
Chronograph
GMT
Diameter
44.5mm
44mm
Thickness
14.4mm
15mm
Lug-to-Lug
52mm
48mm
Lug Width
23mm
22mm
Material
Platinum
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Black
Blue

Movement

3 specs
Caliber
9R01
Seiko NH34A
Type
Spring Drive
Automatic
Power Reserve
192h
40h

Pricing

1 specs
MSRP
$320,000
$399

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