Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGW257?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $38,000 for the Grand Seiko SBGW257 — a $37,751 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGW257?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 38mm for the Grand Seiko SBGW257 — a 2mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGW257?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 30m for the Grand Seiko SBGW257.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGW257?

The Grand Seiko SBGW257 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 SBGW257?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SBGW257 runs a manual (9S64).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGW257

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 SBGW257

sbgw257j

MSRP $38,000

At a glance

12 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGW25738mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGW25772h

Water Resistance

Poseidon Diver (Automatic)300m

SBGW25730m

MSRP

Poseidon Diver (Automatic)$249

SBGW257$38,000

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9S64

Type

Automatic

Manual

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$249

$38,000

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