Side by side
Sheffield 1AvsSeiko Prospex Sea 1970 Heritage Diver's 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
1A40mm
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm
Power Reserve
1A—
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h
Water Resistance
1A200m
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m
MSRP
1A$223
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350
Full specifications
Case
3 specsDiameter
40mm
42.7mm
Thickness
12.8mm
13.2mm
Lug-to-Lug
46mm
46.4mm
Crystal & Dial
4 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
White/Blue
Black
Lume
Swiss blue lume
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Seiko NH35A
6R35
Power Reserve
—
70h
Jewels
25
24
Pricing
1 specsMSRP
$223
$1,350
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