Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB001?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $39,000 for the Grand Seiko SLGB001 — a $38,751 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB001?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 37mm for the Grand Seiko SLGB001 — a 3mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB001?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 100m for the Grand Seiko SLGB001.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB001?

The Grand Seiko SLGB001 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 Grand Seiko SLGB001?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SLGB001 runs a spring drive (9RB2).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SLGB001

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 SLGB001

slgb001j

MSRP $39,000

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SLGB00137mm

Power Reserve

Poseidon Diver (Automatic)40h

SLGB00172h

Water Resistance

Poseidon Diver (Automatic)300m

SLGB001100m

MSRP

Poseidon Diver (Automatic)$249

SLGB001$39,000

Full specifications

Case

6 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9RB2

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$249

$39,000

Follow this matchup

Get a note when Helgray Poseidon Diver (Automatic) vs Grand Seiko SLGB001 gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring