Accompanied by Patek Philippe Extract from the Archives confirming production of the movement in 1919. It has been presented to the Geneva Observatory Contests in 1925 and 1926, was encased in 1934 and sold on 10 January 1947.
The movements of Patek Philippe's watches participating at Observatory Timing Contests were numbered twice.
According to the registers of the Geneva Observatory, this watch was presented to the category B contest on the 1st May 1926 and achieved 218.7 points out of a total of 300 possible points. Its movement was adjusted by the renowned precision adjuster F. Modoux.