Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGW004?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $30,000 for the Grand Seiko SLGW004 — a $29,751 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGW004?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 38.8mm for the Grand Seiko SLGW004 — a 1.2mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGW004?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 30m for the Grand Seiko SLGW004.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGW004?

The Grand Seiko SLGW004 carries a 80-hour power reserve against 40 hours on the Helgray Poseidon Diver (Automatic).

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Grand Seiko SLGW004?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SLGW004 runs a manual (9SA4).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SLGW004

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

Grand Seiko SLGW004

slgw004j

MSRP $30,000

At a glance

12 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SLGW00438.8mm

Power Reserve

Poseidon Diver (Automatic)40h

SLGW00480h

Water Resistance

Poseidon Diver (Automatic)300m

SLGW00430m

MSRP

Poseidon Diver (Automatic)$249

SLGW004$30,000

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9SA4

Type

Automatic

Manual

Power Reserve

40h

80h

Pricing

1 specs

MSRP

$249

$30,000

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