This is a rare 1930s vintage Patek Philippe using the L9-90 movement which I ahve found in Taipei Mr Wang Jun Long's shop during my posting t Taiwan in 2002. Most Patek Philippe watches are in round shape which made this a rare find. In addition to being made with a solid gold case, the watch dial has 11 diamonds markers.
According to Patek Philippe, a lot of 100 NOS caliber 9-90 tonneau movements were found during the workshop departement move to Plan Les Ouates in 1996. With these NOS movements, gave birth to one of two new anniversary watches to celebrate the new Patek Philippe salon. Ref. 5105, a rectangular platinum watch.. old wine in new bottle!