Side by side
Sheffield GMTvsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
GMT40mm
Prospex Sea41.3mm
Power Reserve
GMT—
Prospex Sea72h
Water Resistance
GMT200m
Prospex Sea300m
MSRP
GMT—
Prospex Sea$1,100
Full specifications
Case
5 specsCategory
GMT
Diver
Diameter
40mm
41.3mm
Thickness
13mm
12.5mm
Lug-to-Lug
48mm
48.2mm
Water Resistance
200m
300m
Crystal & Dial
3 specsAR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Blue
Black
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Seiko NH34
6R55
Power Reserve
—
72h
Jewels
25
24
Pricing
1 specsMSRP
—
$1,100
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