Side by side
Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)vsSeiko Prospex Sea
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 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)38mm
Prospex Sea41mm
Power Reserve
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)—
Prospex Sea70h
Water Resistance
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)200m
Prospex Sea200m
MSRP
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)$223
Prospex Sea$900
Full specifications
Case
3 specsDiameter
38mm
41mm
Thickness
12.8mm
12.3mm
Lug-to-Lug
46mm
46.9mm
Crystal & Dial
4 specsCrystal Shape
Flat
Curved
AR 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
6R35
Power Reserve
—
70h
Jewels
25
24
Pricing
1 specsMSRP
$223
$900
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