Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex LX line?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $6,500 for the Seiko Prospex LX line — a $6,251 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex LX line?

The Seiko Prospex LX line wears larger at 44.8mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 4.8mm difference across the dial.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex LX line?

The Seiko Prospex LX line carries a 72-hour power reserve against 40 hours on the Helgray Poseidon Diver (Automatic).

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Seiko Prospex LX line?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Seiko Prospex LX line runs a spring drive (5R65).

Side by side

Helgray Poseidon Diver (Automatic)vsSeiko Prospex LX line

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Helgray Poseidon Diver (Automatic)

poseidon-diver-automatic

MSRP $249

Seiko Prospex LX line

snr029j1

MSRP $6,500

At a glance

12 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Prospex LX line44.8mm

Power Reserve

Poseidon Diver (Automatic)40h

Prospex LX line72h

Water Resistance

Poseidon Diver (Automatic)300m

Prospex LX line300m

MSRP

Poseidon Diver (Automatic)$249

Prospex LX line$6,500

Full specifications

Case

5 specs

Diameter

40mm

44.8mm

Thickness

12mm

15.7mm

Lug-to-Lug

46mm

50.9mm

Lug Width

20mm

22mm

Material

Stainless Steel

Titanium

Crystal & Dial

2 specs

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

NH35 Warranty

5R65

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$249

$6,500

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