Side by side
Helgray Poseidon Diver (Automatic)vsSeiko Astron GPS Solar 2025 Limited 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
Poseidon Diver (Automatic)40mm
Astron GPS Solar 2025 Limited Edition42mm
Power Reserve
Poseidon Diver (Automatic)40h
Astron GPS Solar 2025 Limited Edition40h
Water Resistance
Poseidon Diver (Automatic)300m
Astron GPS Solar 2025 Limited Edition100m
MSRP
Poseidon Diver (Automatic)$249
Astron GPS Solar 2025 Limited Edition$2,600
Full specifications
Case
6 specsCategory
Diver
GMT
Diameter
40mm
42mm
Lug-to-Lug
46mm
47.9mm
Lug Width
20mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m
Crystal & Dial
2 specsAR Coating
Inner
Super-clear coating
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
NH35 Warranty
3X62
Type
Automatic
Quartz
Jewels
25
10
Pricing
1 specsMSRP
$249
$2,600
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