very rare luxury and historical high class Henri Duvoisin triple calendar moonphase watch in an expensive waterproof gold plated srew back case, diameter 33 mm without crown, please dont mix it with the cheaper push back case beatifull perfect original dial with golden indices and golden hands best swiss movement, caliber Venus 203, red gold rhodium plated, perfect working, manual wind movement; 17 jewels, hour, minute, second, full calendar, moon phase, signed with Cornavin, an old and now extinct Swiss brand, used to make them. Henri Duvoisin was the commercial name. new croco-leather strap 23 cm shipped with full insurance