The Bidlingmaier B12 watch movement is a modified mechanical movement that was developed during the 1970s. It features a quartz controlled stepper motor, providing precise timekeeping. The movement includes a sweep second hand, as well as a quickset date function. It is an electronic, quartz movement that incorporates a sweep seconds feature and a calendar. The Bidlingmaier B12 movement was used during the period of 1970 and onwards.