The Bettlach 8488-73 is a pin-lever movement with an indirect minute hand friction clutch on the barrel and a stem mechanism without a setting-lever spring. It features either 14 or 15 functional jewels, which is relatively high for a pin-lever movement. In addition, there are additional jewels included for decorative purposes. Including an impulse pin made of steel between the bearings of the 3rd and 4th wheel allows for at least 15 functional jewels. The movement also offers the option of adding 2 or 6 extra jewels to achieve a total of 17 or 21 jewels, respectively. The Bettlach 8488-73 movement offers manual winding, sweep seconds, and a date function with a +/-24h adjustment range. With its pin-lever design, it represents a movement popular during the period circa 1955.