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
9 of 29 specs differDiameter
Poseidon Diver (Automatic)40mm
Prospex Sea41.3mm
Power Reserve
Poseidon Diver (Automatic)40h
Prospex Sea72h
Water Resistance
Poseidon Diver (Automatic)300m
Prospex Sea300m
MSRP
Poseidon Diver (Automatic)$249
Prospex Sea$1,100
Full specifications
Case
3 specsDiameter
40mm
41.3mm
Thickness
12mm
12.5mm
Lug-to-Lug
46mm
48.2mm
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH35 Warranty
6R55
Power Reserve
40h
72h
Jewels
25
24
Pricing
1 specsMSRP
$249
$1,100
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