Ludwig Muller S.A., Genève

European Watch Clock and Jewellery Fair 1991 BF 230
This apparatus was designed for all those who have anything to do with complex mechanical watches. It allows spring-driven mechanisms to be wound automatically, sparing them the tricky job of resetting to the correct date and exact time watches that are not wound daily. It is powered by a rechargeable battery with a minimum power reserve of four weeks. A timepiece in the control box monitors the drive system. A device (friction disks) decouples the apparatus when winding is complete. It can also wind a series of watches mounted collectively. (LUDWIG MULLER S.A., Geneva)