Side by side
Helgray Poseidon Diver (Automatic)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
Poseidon Diver (Automatic)40mm
Prospex Sea41mm
Power Reserve
Poseidon Diver (Automatic)40h
Prospex Sea70h
Water Resistance
Poseidon Diver (Automatic)300m
Prospex Sea200m
MSRP
Poseidon Diver (Automatic)$249
Prospex Sea$900
Full specifications
Case
4 specsDiameter
40mm
41mm
Thickness
12mm
12.3mm
Lug-to-Lug
46mm
46.9mm
Water Resistance
300m
200m
Crystal & Dial
3 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH35 Warranty
6R35
Power Reserve
40h
70h
Jewels
25
24
Pricing
1 specsMSRP
$249
$900
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