The International Durowe 391-4 watch movement is a robot-automatic module that can be screwed onto an ordinary manual-wind movement. This module features an excenter winding mechanism, inspired by Pellaton, with ruby rollers to transfer the excenter motion to the pawl wheel. It is compatible with manual-wind movements that have at least 10.5''' and an engagement to the ratchet wheel is feasible. The movement requires a mainspring with a slip spring. The International Durowe 391-4 movement offers functions such as manual wind, sweep second, date set by +/-24h, automatic winding, and sweep seconds. This movement was commonly utilized during the period around 1960 and was also utilized by other manufacturers like AHO and VUFE.