Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGE277?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $6,800 for the Grand Seiko SBGE277 — a $6,551 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGE277?

The Grand Seiko SBGE277 wears larger at 44mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 4mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGE277?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Grand Seiko SBGE277.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGE277?

The Grand Seiko SBGE277 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 SBGE277?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SBGE277 runs a spring drive (9R66).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGE277

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 SBGE277

sbge277g

MSRP $6,800

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGE27744mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGE27772h

Water Resistance

Poseidon Diver (Automatic)300m

SBGE277200m

MSRP

Poseidon Diver (Automatic)$249

SBGE277$6,800

Full specifications

Case

6 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9R66

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$249

$6,800

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