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
11 of 29 specs differDiameter
1A 40mm40mm
Prospex Sea Save the Ocean Special Edition42.4mm
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$550
Full specifications
Case
4 specsCategory
—
Diver
Diameter
40mm
42.4mm
Thickness
13mm
13.4mm
Lug-to-Lug
48mm
49.4mm
Crystal & Dial
3 specsCrystal
Sapphire
Hardlex
Dial Color
—
Black
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH35
Seiko 4R36
Power Reserve
40h
41h
Jewels
25
24
Pricing
1 specsMSRP
$228
$550
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