The Bettlach 8111 watch movement was produced between 1963 and 1974, with a total of 43,800 units manufactured. It features an excenter winding mechanism, utilizing 25 jewels with ruby-rollers. The balance spokes are equipped with adjustment screws, and a Breguet hairspring is employed. The movement also includes a double excenter regulator for curb pins and stud carrier. Additional functions of the Bettlach 8111 movement include automatic winding, a sweep second hand, and the optional hack feature. It is equipped with Incabloc shock protection and is primarily used during the period stated above.