Platinum Watch no. 615408

Case: s/n; 615,408, Platinum, Patek Philippe & Co. Geneve, Swiss, Dial: silver or platinum, Patek Philippe & Cie., Geneve Movement: s/n; 860,323, caliber 17 ligne, Patek Philippe & Co., Geneve, Swiss, Eighteen 18 jewels,Three (3) Heat, Cold isochronism, Adjusted five (5) positions. Provenance: 1932 - Niton, Geneve (still validating, ebauche and/or finished by Niton, CH Meylan or ?) 1937 - Patek Philippe, Geneve 2019 - Philip Poniz - During the time the movement was made, 1936-37, Patek Philippe bought about 30 watches and movements from Niton. They were calibers 6, 7, 11 and 17'''. For instance, No's. 860182 and 860163.