The Bidlingmaier 910 watch movement features a pin-lever escapement, accompanied by an indirect minute hand friction clutch on the barrel. This movement is commonly or always identified as the Baumgartner 670, with the differences between the 677 and 680 variations remaining undisclosed. The movement combines a simple manual-wind chronograph function, with a 60-second sweep second and start/stop capabilities, while lacking a reset feature. Its period of use is approximately around the 1950s.