Pseudo Mechanic watch: Pseudo Mechanical clock real time-date for your computer desktop background. Move your cursor over clock wells to rotate them. Can be used for standard computer monitors, widescreen or other non-standard displays. Displays the time like a real digital clock. Changes rapidly and includes hours, minutes, seconds and AM/PM indication. The difficulty in inventing a mechanical clock was to figure out a way in which a wheel no bigger than a room could turn at the same speed as the Earth, can you believe that?.