Which is cheaper, the Hamilton Khaki Aviation Day Date Auto or the Helgray Poseidon Diver (Automatic)?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $1,125 for the Hamilton Khaki Aviation Day Date Auto — a $876 gap before any retailer discounting.

Which is bigger, the Hamilton Khaki Aviation Day Date Auto or the Helgray Poseidon Diver (Automatic)?

The Hamilton Khaki Aviation Day Date Auto wears larger at 42mm versus 40mm for the Helgray Poseidon Diver (Automatic) — a 2mm difference across the dial.

Which has better water resistance, the Hamilton Khaki Aviation Day Date Auto or the Helgray Poseidon Diver (Automatic)?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 100m for the Hamilton Khaki Aviation Day Date Auto.

Which has a longer power reserve, the Hamilton Khaki Aviation Day Date Auto or the Helgray Poseidon Diver (Automatic)?

The Hamilton Khaki Aviation Day Date Auto carries a 80-hour power reserve against 40 hours on the Helgray Poseidon Diver (Automatic).

What movement does the Hamilton Khaki Aviation Day Date Auto run compared to the Helgray Poseidon Diver (Automatic)?

Both watches run automatic movements — the Hamilton Khaki Aviation Day Date Auto uses the H-40 and the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty.

Side by side

Hamilton Khaki Aviation Day Date AutovsHelgray Poseidon Diver (Automatic)

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Hamilton Khaki Aviation Day Date Auto

h64645131

MSRP $1,125

Helgray Poseidon Diver (Automatic)

poseidon-diver-automatic

MSRP $249

At a glance

7 of 29 specs differ

Diameter

Khaki Aviation Day Date Auto42mm

Poseidon Diver (Automatic)40mm

Power Reserve

Khaki Aviation Day Date Auto80h

Poseidon Diver (Automatic)40h

Water Resistance

Khaki Aviation Day Date Auto100m

Poseidon Diver (Automatic)300m

MSRP

Khaki Aviation Day Date Auto$1,125

Poseidon Diver (Automatic)$249

Full specifications

Case

4 specs

Movement

2 specs

Caliber

H-40

NH35 Warranty

Power Reserve

80h

40h

Pricing

1 specs

MSRP

$1,125

$249

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