Which is cheaper, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Hamilton Khaki Aviation Day Date Auto?

At MSRP the Hamilton Khaki Aviation Day Date Auto is the cheaper of the two at $1,125, against $1,800 for the Marathon OSAR-D (Original SAR with Date) Automatic 41mm — a $675 gap before any retailer discounting.

Which is bigger, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Hamilton Khaki Aviation Day Date Auto?

The Hamilton Khaki Aviation Day Date Auto wears larger at 42mm versus 41mm for the Marathon OSAR-D (Original SAR with Date) Automatic 41mm — a 1mm difference across the dial.

Which has a longer power reserve, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Hamilton Khaki Aviation Day Date Auto?

The Hamilton Khaki Aviation Day Date Auto carries a 80-hour power reserve against 40 hours on the Marathon OSAR-D (Original SAR with Date) Automatic 41mm.

What movement does the Marathon OSAR-D (Original SAR with Date) Automatic 41mm run compared to the Hamilton Khaki Aviation Day Date Auto?

Both watches run automatic movements — the Marathon OSAR-D (Original SAR with Date) Automatic 41mm uses the Sellita SW220-1 and the Hamilton Khaki Aviation Day Date Auto uses the H-40.

Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsHamilton Khaki Aviation Day Date Auto

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

Marathon OSAR-D (Original SAR with Date) Automatic 41mm

41mm-original-sar-w-date-osar-d

MSRP $1,800

Hamilton Khaki Aviation Day Date Auto

h64645131

MSRP $1,125

At a glance

10 of 29 specs differ

Diameter

OSAR-D (Original SAR with Date) Automatic 41mm41mm

Khaki Aviation Day Date Auto42mm

Power Reserve

OSAR-D (Original SAR with Date) Automatic 41mm40h

Khaki Aviation Day Date Auto80h

Water Resistance

OSAR-D (Original SAR with Date) Automatic 41mm300m

Khaki Aviation Day Date Auto100m

MSRP

OSAR-D (Original SAR with Date) Automatic 41mm$1,800

Khaki Aviation Day Date Auto$1,125

Full specifications

Case

7 specs

Movement

2 specs

Caliber

Sellita SW220-1

H-40

Power Reserve

40h

80h

Pricing

1 specs

MSRP

$1,800

$1,125

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Marathon OSAR-D (Original SAR with Date) Automatic 41mm

The Marathon OSAR-D (Original SAR with Date) Automatic 41mm is noted for its highly legible white dial with applied hour markers and a functional date magnifier, emphasizing its tool-watch purpose. Its Swiss-made Sellita SW200-1 movement is considered reliable and serviceable. One reviewer found the bracelet lacked refinement and preferred the rubber strap option. Overall, owners and reviewers appreciate the Marathon OSAR-D (Original SAR with Date) Automatic 41mm for its excellent legibility and robust movement.

Fratello

A Blog to Watch

Hamilton Khaki Aviation Day Date Auto

Owners and reviewers widely praise the Hamilton Khaki Aviation Day Date Auto for its handsome, legible dial with raised indices and day/date complications, and its versatile, modern pilot watch design. The fully brushed case and good lume are noted strengths, with one owner finding it wears comfortably on a NATO strap. The H-10 caliber offers an 80-hour power reserve, though its decoration and regulation are less refined. Some find the 42mm size large and the skeletonized hour hand tip visually unappealing, while others note the AR coating is decent but not exceptional. Overall, owners and reviewers rate the Hamilton Khaki Aviation Day Date Auto highly for its practical design and value at its price point.

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