The Bettlach 8481 watch movement was produced between 1961 and 1963, with a total of 18,000 units manufactured during this period. It features an indirectly driven minute, which enables a substantial balance and low profile. The movement includes a hacking function, achieved by stopping the 4th wheel instead of the more commonly used balance. In terms of functions, it encompasses manual winding, a sub seconds display, and a sweep seconds hand.