Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGA009?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $9,800 for the Grand Seiko SLGA009 — a $9,551 gap before any retailer discounting.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGA009?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 100m for the Grand Seiko SLGA009.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGA009?

The Grand Seiko SLGA009 carries a 120-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 SLGA009?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SLGA009 runs a spring drive (9RA2).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SLGA009

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 SLGA009

slga009g

MSRP $9,800

At a glance

10 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SLGA00940mm

Power Reserve

Poseidon Diver (Automatic)40h

SLGA009120h

Water Resistance

Poseidon Diver (Automatic)300m

SLGA009100m

MSRP

Poseidon Diver (Automatic)$249

SLGA009$9,800

Full specifications

Case

5 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9RA2

Type

Automatic

Spring Drive

Power Reserve

40h

120h

Pricing

1 specs

MSRP

$249

$9,800

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