Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB023?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $12,400 for the Grand Seiko SLGB023 — a $12,151 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB023?

The Grand Seiko SLGB023 wears larger at 40.8mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 0.8mm difference across the dial.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Grand Seiko SLGB023?

The Grand Seiko SLGB023 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 SLGB023?

The Helgray Poseidon Diver (Automatic) runs a automatic caliber (NH35 Warranty), while the Grand Seiko SLGB023 runs a spring drive (9RB1).

Side by side

Helgray Poseidon Diver (Automatic)vsGrand Seiko SLGB023

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 SLGB023

slgb023g

MSRP $12,400

At a glance

10 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

SLGB02340.8mm

Power Reserve

Poseidon Diver (Automatic)40h

SLGB02372h

Water Resistance

Poseidon Diver (Automatic)300m

SLGB023300m

MSRP

Poseidon Diver (Automatic)$249

SLGB023$12,400

Full specifications

Case

5 specs

Diameter

40mm

40.8mm

Thickness

12mm

12.9mm

Lug-to-Lug

46mm

48.5mm

Lug Width

20mm

21mm

Material

Stainless Steel

Titanium

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

NH35 Warranty

9RB1

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$249

$12,400

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