A-17 24HR Pilots Waltham Watch 17 Jewels MIL-W-6433 Running

In the early 1950s the MIL-W-6433 spec was released, and the A-17 was born. This watch, intended as a navigation timepiece for pilots, had been in development for some time as an upgraded version of the A-11, with radium added to the numerals, 5-minute indices, hour and minute hands, and the tip of the sweep seconds hand, and an auxiliary 13-24-hour track added to aid in reading military time. The back of the arrow-tipped seconds hand on these watches was generally "lollipop"-shaped.

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