Hamilton Khaki Automatic Tachymiler Chronograph

The Hamilton Khaki Automatic Tachymiler Chronograph (Ref. H717260) is a specialized aviation tool watch notable for its "lefty" orientation and technical complexity.

## Summary of Specifications

* Movement: Powered by the Caliber H-21 (modified Valjoux 7750), a Swiss automatic chronograph movement with an extended 60-hour power reserve.
* Case: A robust 45mm stainless steel case (sometimes listed as 44mm) featuring an exhibition case back to view the movement.
* Design: Distinctive left-sided crown and pushers designed for comfort and ease of use for right-handed wearers or left-handed pilots.
* Features: Includes a tachymeter scale for speed calculations, day/date display, and sub-dials for chronograph tracking.
* Crystal: Scratch-resistant sapphire crystal protecting a high-legibility white or silver dial.