Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGM245?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $6,100 for the Grand Seiko SBGM245 — a $5,851 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGM245?

The Grand Seiko SBGM245 wears larger at 40.5mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 0.5mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGM245?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Grand Seiko SBGM245.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGM245?

The Grand Seiko SBGM245 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 SBGM245?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Grand Seiko SBGM245 uses the 9S66.

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGM245

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 SBGM245

sbgm245g

MSRP $6,100

At a glance

9 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGM24540.5mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGM24572h

Water Resistance

Poseidon Diver (Automatic)300m

SBGM245200m

MSRP

Poseidon Diver (Automatic)$249

SBGM245$6,100

Full specifications

Case

5 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

NH35 Warranty

9S66

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$249

$6,100

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