Side by side
Sheffield 1A 38vsSeiko 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
10 of 29 specs differDiameter
1A 3838mm
Prospex Sea Save the Ocean Special Edition43.8mm
Power Reserve
1A 38—
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
1A 38200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
1A 38$238
Prospex Sea Save the Ocean Special Edition$650
Full specifications
Case
3 specsDiameter
38mm
43.8mm
Lug-to-Lug
46mm
48.7mm
Lug Width
20mm
22mm
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 NH35
4R35
Power Reserve
—
41h
Jewels
25
23
Pricing
1 specsMSRP
$238
$650
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