Patek Philippe: A gold waterproof wristwatch made for Favre-Leuba & Co., the matt silvered dial with raised gold baton numerals and subsidiary seconds, the case with screwed back with makers mark numbered Ref. 2509 686358, the signed movement under dust cover jewelled to the centre and the bimetallic balance with micrometer movement numbered 724675, with 9ct. gold flexible bracelet and clasp