Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Spinnaker Dumas GMT?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $399 for the Spinnaker Dumas GMT — a $150 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Spinnaker Dumas GMT?

The Spinnaker Dumas GMT wears larger at 44mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 4mm difference across the dial.

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Spinnaker Dumas GMT?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Spinnaker Dumas GMT uses the Seiko NH34A.

Side by side

Helgray Poseidon Diver (Automatic)vsSpinnaker Dumas GMT

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

Spinnaker Dumas GMT

dumas-gmt-automatic-ocean-blue-sp-5119-55

MSRP $399

At a glance

9 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Dumas GMT44mm

Power Reserve

Poseidon Diver (Automatic)40h

Dumas GMT40h

Water Resistance

Poseidon Diver (Automatic)300m

Dumas GMT300m

MSRP

Poseidon Diver (Automatic)$249

Dumas GMT$399

Full specifications

Case

6 specs

Crystal & Dial

1 specs

Dial Color

Black

Blue

Movement

1 specs

Caliber

NH35 Warranty

Seiko NH34A

Pricing

1 specs

MSRP

$249

$399

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