Twenty-four-hour analog watches are used today by pilots, scientists, and the militaries, and are sometimes preferred because of the unambiguous representation of a whole day at one time. Note that this definition refers to the use russian single hand watch a complete circular dial to represent a 24-hour day. Using the numbers from 1 to 24 to mark the day is the 24-hour watch system. DO YOU HAVE A QUESTION ABOUT THIS MODELS?