The Universal Geneve 381 watch movement is a mechanical movement widely comparable to the Seiko 6602B. It was developed and sold by Seiko specifically as a bare movement. The movement features a stem mechanism without a setting-lever spring and utilizes Seiko-Diafix combined settings for the escapement wheel. The Universal Geneve 381 movement includes several functions, including manual-winding, sweep second, and a date feature that can be set by changing the time to 21:30-24h. It was commonly used during the approximate period of 1966.