The Bettlach 8101 watch movement is similar to the Felsa 4568 movement, with slight differences that are not explicitly understood. The movement features an automatic winding mechanism and a sweep seconds function. It also includes a date feature that can be set by adjusting the time between 21:15-24h. The Bettlach 8101 movement was commonly used around the year 1970.

The Bettlach 8101 features the following functions:

• Automatic Winding
• Date: set by changing 21:15-24h
• Sweep second