Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGH289?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $7,700 for the Grand Seiko SBGH289 — a $7,451 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGH289?

The Grand Seiko SBGH289 wears larger at 43.8mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 3.8mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGH289?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Grand Seiko SBGH289.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SBGH289?

The Grand Seiko SBGH289 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 SBGH289?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Grand Seiko SBGH289 uses the 9S85.

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SBGH289

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 SBGH289

sbgh289g

MSRP $7,700

At a glance

9 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SBGH28943.8mm

Power Reserve

Poseidon Diver (Automatic)40h

SBGH28955h

Water Resistance

Poseidon Diver (Automatic)300m

SBGH289200m

MSRP

Poseidon Diver (Automatic)$249

SBGH289$7,700

Full specifications

Case

5 specs

Diameter

40mm

43.8mm

Thickness

12mm

14.7mm

Lug-to-Lug

46mm

51mm

Lug Width

20mm

22mm

Water Resistance

300m

200m

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

NH35 Warranty

9S85

Power Reserve

40h

55h

Pricing

1 specs

MSRP

$249

$7,700

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