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

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $350 for the Spinnaker Cahill Automatic — a $101 gap before any retailer discounting.

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

The Spinnaker Cahill Automatic wears larger at 42mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 2mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Spinnaker Cahill Automatic?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 200m for the Spinnaker Cahill Automatic.

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

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Spinnaker Cahill Automatic uses the SII NH35A.

Side by side

Helgray Poseidon Diver (Automatic)vsSpinnaker Cahill Automatic

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 Cahill Automatic

cahill-automatic-moss-green-sp-5064-02

MSRP $350

At a glance

9 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Cahill Automatic42mm

Power Reserve

Poseidon Diver (Automatic)40h

Cahill Automatic40h

Water Resistance

Poseidon Diver (Automatic)300m

Cahill Automatic200m

MSRP

Poseidon Diver (Automatic)$249

Cahill Automatic$350

Full specifications

Case

6 specs

Diameter

40mm

42mm

Thickness

12mm

13.7mm

Lug-to-Lug

46mm

51mm

Lug Width

20mm

22mm

Material

Stainless Steel

316L Stainless Steel

Water Resistance

300m

200m

Crystal & Dial

1 specs

Dial Color

Black

Green

Movement

1 specs

Caliber

NH35 Warranty

SII NH35A

Pricing

1 specs

MSRP

$249

$350

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