Side by side
Sheffield 1A 40mmvsSeiko 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
12 of 29 specs differDiameter
1A 40mm40mm
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm
Power Reserve
1A 40mm40h
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h
Water Resistance
1A 40mm200m
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m
MSRP
1A 40mm$228
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350
Full specifications
Case
4 specsCategory
—
Diver
Diameter
40mm
42.7mm
Thickness
13mm
13.2mm
Lug-to-Lug
48mm
46.4mm
Crystal & Dial
4 specsCrystal Shape
Flat
Curved
AR 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
6R35
Power Reserve
40h
70h
Jewels
25
24
Pricing
1 specsMSRP
$228
$1,350
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