The Mido 1147NOC is a manual-wind chronograph movement with a 60-second sub-dial. It features a cam-switched mechanism capable of measuring both 30 and 45 minutes. The watch movement includes additional functions such as a small seconds sub-dial, a Tag at 9 o'clock controlled by a pusher, a date hand at 6 o'clock with a pusher at 8 o'clock, and a month indication controlled by a pusher at 2:30 o'clock. The Mido 1147NOC was produced in series from 1937 to 1970, with over 3.5 million units manufactured.