Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $3,000 for the Seiko Prospex SPEEDTIMER — a $2,751 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Seiko Prospex SPEEDTIMER?

The Seiko Prospex SPEEDTIMER wears larger at 42.5mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 2.5mm difference across the dial.

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

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 10m for the Seiko Prospex SPEEDTIMER.

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

The Seiko Prospex SPEEDTIMER carries a 45-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?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Seiko Prospex SPEEDTIMER uses the 8R46.

Side by side

Helgray Poseidon Diver (Automatic)vsSeiko Prospex SPEEDTIMER

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

srq037j1

MSRP $3,000

At a glance

12 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Prospex SPEEDTIMER42.5mm

Power Reserve

Poseidon Diver (Automatic)40h

Prospex SPEEDTIMER45h

Water Resistance

Poseidon Diver (Automatic)300m

Prospex SPEEDTIMER100m

MSRP

Poseidon Diver (Automatic)$249

Prospex SPEEDTIMER$3,000

Full specifications

Case

5 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

8R46

Power Reserve

40h

45h

Jewels

Pricing

1 specs

MSRP

$249

$3,000

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