Hamilton
Khaki Aviation Pilot Day Date Auto
H64645531
Pilot-ready legibility meets automatic convenience in a 42 mm steel package.
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Overview
The Hamilton Khaki Aviation Pilot Day Date Auto (ref. H64645531) is a 42 mm stainless-steel pilot's watch powered by the in-house-developed Cal. H-40 automatic movement. Its black dial carries bold luminous Arabic numerals alongside a day-date complication, prioritising at-a-glance readability in the tradition of purpose-built aviation timepieces. Introduced in 2016, the reference remains a current production model within Hamilton's long-running Khaki Aviation collection.
History
Hamilton's Khaki Aviation line traces its roots to the brand's deep history of supplying instrument-grade watches to military and civil aviation. The H64645531 was introduced around 2016 as part of a broader refresh of the Pilot Day Date family, bringing an automatic movement and a generously sized 42 mm case to a format that had previously relied on quartz. The Cal. H-40 movement, developed in collaboration with the Swatch Group's movement-making infrastructure, gave the line a mechanical heart that collectors had long requested. The reference has remained in continuous production, reflecting steady demand for an accessible, legible pilot's automatic.
Notable points
- 42 mm stainless-steel case strikes a balance between vintage pilot proportions and modern wrist presence.
- Cal. H-40 automatic movement provides reliable self-winding performance with a solid power reserve.
- Black dial with large luminous Arabic numerals delivers the high-contrast legibility expected of a true pilot's watch.
- Day-date complication adds practical utility without cluttering the instrument-style layout.
- Part of Hamilton's Khaki Aviation line, a collection with direct lineage to the brand's military and aviation supply heritage.
Specifications
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