With Patek Philippe Extract from the Archives confirming production of the present watch with guilloched case and fluted caseband in 1870 and its subsequent sale on 4 December 1872.
This watch is amongst the earliest perpetual calendar watches made by Patek Philippe and together with watch no. 31'587 (see Patek Philippe by Martin Huber & Alan Banbery, p. 204, pl. 177 a & b) the earliest example of a perpetual calendar watch featuring a dial layout with four individual subsidiary dials, the classical layout still in use today. Made in 1870, it is furthermore amongst the complicated watches made before Antoine de Patek's death in 1877.
Adrien Philippe's perpetual calendar mechanism was patented in 1889 but was already in use before, such watches however often featured experimental systems which were improved over the years.
Consigned by a private collector and never been offered in public before, this watch is furthermore preserved in good, original overall condition.