Cheat sheet for the 24-hour time
The outer ring of the Hamilton Khaki Field Day Date Auto shows the usual hour and minute scale with subdivision into 12 hours. Between the minute markings, there is the further subdivision into fractions of a second typical of Hamilton for extra precise timekeeping. But the inner ring also bears a scale that is located just below the tip of the hour hand. It lacks the fine division of the seconds and the hour markings are only slightly thicker than the minute markings. They are inscribed with the hour numbers 13 to 24 of the 24-hour time and thus help to quickly adapt the watch's time display to this rather unusual form of indication.
Day Date Auto
The word Day in the name of the Hamilton Khaki Field Day Date Auto refers to the day of the week, which is located below the 24 o'clock mark in a curved viewing window. Here the day of the week is displayed in full in English. The respective date - English Date - can be found in Arabic numerals in a rectangular viewing window, which takes the position of the 6 pm line. As a true automatic watch, the Hamilton Khaki Field Day Date Auto is kept running by the wearer's everyday movements and only needs to be wound when it has not been worn for more than its 80-hour power reserve.