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
10 of 29 specs differDiameter
Poseidon Diver (Automatic)40mm
Prospex Sea41.7mm
Power Reserve
Poseidon Diver (Automatic)40h
Prospex Sea41h
Water Resistance
Poseidon Diver (Automatic)300m
Prospex Sea200m
MSRP
Poseidon Diver (Automatic)$249
Prospex Sea$595
Full specifications
Case
4 specsDiameter
40mm
41.7mm
Thickness
12mm
12.3mm
Lug-to-Lug
46mm
49.5mm
Water Resistance
300m
200m
Crystal & Dial
2 specsCrystal
Sapphire
Hardlex
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
NH35 Warranty
4R35
Power Reserve
40h
41h
Jewels
25
23
Pricing
1 specsMSRP
$249
$595
Follow this matchup
Get a note when Helgray Poseidon Diver (Automatic) vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.
Seiko Prospex SeavsGalo Super200 Dark EditionSeiko Prospex SeavsVaer D5 Tropic AutoBremont Supermarine 300MvsSeiko Prospex SeaIslander Hudson "Harpoon Diver" 40mm Watch with Degrading Black Dial #ISL-302vsSeiko Prospex SeaHelgray Poseidon Diver (Automatic)vsBorealis Watch Co. JamantaDryden PathfindervsHelgray Poseidon Diver (Automatic)