Side by side
Maystone Watch Co Prosperity GMTvsGrand Seiko SBGM221
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Prosperity GMT38mm
SBGM22139.5mm
Power Reserve
Prosperity GMT41h
SBGM22172h
Water Resistance
Prosperity GMT100m
SBGM22130m
MSRP
Prosperity GMT$443
SBGM221$5,400
Full specifications
Case
6 specsCategory
—
GMT
Diameter
38mm
39.5mm
Thickness
11.9mm
13.7mm
Lug-to-Lug
46mm
46.9mm
Lug Width
20mm
19mm
Water Resistance
100m
30m
Crystal & Dial
3 specsAR Coating
Inner
Yes
Dial Color
Red
Black
Lume
string
None
Movement
2 specsCaliber
Seiko NH34
9S66
Power Reserve
41h
72h
Pricing
1 specsMSRP
—
$5,400
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