Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGJ237?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $7,600 for the Grand Seiko SBGJ237 — a $7,351 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGJ237?

The Grand Seiko SBGJ237 wears larger at 44.2mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 4.2mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGJ237?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Grand Seiko SBGJ237.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGJ237?

The Grand Seiko SBGJ237 carries a 55-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 SBGJ237?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Grand Seiko SBGJ237 uses the 9S86.

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGJ237

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 SBGJ237

sbgj237g

MSRP $7,600

At a glance

10 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGJ23744.2mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGJ23755h

Water Resistance

Poseidon Diver (Automatic)300m

SBGJ237200m

MSRP

Poseidon Diver (Automatic)$249

SBGJ237$7,600

Full specifications

Case

6 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

NH35 Warranty

9S86

Power Reserve

40h

55h

Pricing

1 specs

MSRP

$249

$7,600

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