The A Michel 483 watch movement is a larger version of the ETA 1138, featuring a similar base plate. It is commonly found with the signature on the dial side indicating the use of the ETA 1120 movement. Not much information is available regarding the differences between the ETA 1121, 1123, 1125, 1127, 1129, 1131, 1133, 1139, and 1289 movements. The A Michel 483 movement is a manual wind movement that includes a sub-second function. It was commonly used around the 1950s.