Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $1,150 for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition — a $901 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition — a 0.5mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition 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 Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition uses the 6R55.

Side by side

Helgray Poseidon Diver (Automatic)vsSeiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

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

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

spb517j1

MSRP $1,150

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition39.5mm

Power Reserve

Poseidon Diver (Automatic)40h

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition72h

Water Resistance

Poseidon Diver (Automatic)300m

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition200m

MSRP

Poseidon Diver (Automatic)$249

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition$1,150

Full specifications

Case

4 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

NH35 Warranty

6R55

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$249

$1,150

Follow this matchup

Get a note when Helgray Poseidon Diver (Automatic) vs Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring