Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGX355?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $4,100 for the Grand Seiko SBGX355 — a $3,851 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGX355?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 37mm for the Grand Seiko SBGX355 — a 3mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGX355?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 100m for the Grand Seiko SBGX355.

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Grand Seiko SBGX355?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SBGX355 runs a quartz (9F62).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGX355

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 SBGX355

sbgx355g

MSRP $4,100

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGX35537mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGX35540h

Water Resistance

Poseidon Diver (Automatic)300m

SBGX355100m

MSRP

Poseidon Diver (Automatic)$249

SBGX355$4,100

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

NH35 Warranty

9F62

Type

Automatic

Quartz

Pricing

1 specs

MSRP

$249

$4,100

Follow this matchup

Get a note when Helgray Poseidon Diver (Automatic) vs Grand Seiko SBGX355 gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring