Which is bigger, the Hamilton Khaki Aviation Day Date Auto or the Zero West LS-1 Land Speed 1927?

The Zero West LS-1 Land Speed 1927 wears larger at 44mm versus 42mm for the Hamilton Khaki Aviation Day Date Auto — a 2mm difference across the dial.

Which has a longer power reserve, the Hamilton Khaki Aviation Day Date Auto or the Zero West LS-1 Land Speed 1927?

The Hamilton Khaki Aviation Day Date Auto carries a 80-hour power reserve against 48 hours on the Zero West LS-1 Land Speed 1927.

What movement does the Hamilton Khaki Aviation Day Date Auto run compared to the Zero West LS-1 Land Speed 1927?

Both watches run automatic movements — the Hamilton Khaki Aviation Day Date Auto uses the H-40 and the Zero West LS-1 Land Speed 1927 uses the ETA 7750.

Side by side

Hamilton Khaki Aviation Day Date AutovsZero West LS-1 Land Speed 1927

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

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Hamilton Khaki Aviation Day Date Auto

h64645131

MSRP $1,125

Zero West LS-1 Land Speed 1927

ls-1-land-speed-bullhead-chronograph-1927

At a glance

8 of 29 specs differ

Diameter

Khaki Aviation Day Date Auto42mm

LS-1 Land Speed 192744mm

Power Reserve

Khaki Aviation Day Date Auto80h

LS-1 Land Speed 192748h

Water Resistance

Khaki Aviation Day Date Auto100m

LS-1 Land Speed 1927100m

MSRP

Khaki Aviation Day Date Auto$1,125

LS-1 Land Speed 1927—

Full specifications

Case

5 specs

Movement

2 specs

Caliber

H-40

ETA 7750

Power Reserve

80h

48h

Pricing

1 specs

MSRP

$1,125

—

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Hamilton Khaki Aviation Day Date AutovsZero West LS-1 Land Speed 1927

At a glance

Full specifications

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