Side by side
Sheffield 1A 40mmvsSeiko Prospex Sea Save the Ocean Special Edition
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
1A 40mm40mm
Prospex Sea Save the Ocean Special Edition43.8mm
Power Reserve
1A 40mm40h
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
1A 40mm200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
1A 40mm$228
Prospex Sea Save the Ocean Special Edition$650
Full specifications
Case
5 specsCategory
—
Diver
Diameter
40mm
43.8mm
Thickness
13mm
12.8mm
Lug-to-Lug
48mm
48.7mm
Lug Width
20mm
22mm
Crystal & Dial
3 specsAR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
—
Black
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Seiko NH35
4R35
Power Reserve
40h
41h
Jewels
25
23
Pricing
1 specsMSRP
$228
$650
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