The design, finish and serial number of the movement of this watch shows that it was undoubtedly made by Audemars Piguet for Gubelin. From around 1900, Audemars Piguet began to put their own signatures on their movements and dials. However, watches ordered by very special customers such as Gubelin, Cartier, Golay and Tiffany continued to be signed with the name of the customer.
Although this watch does not have a year indication it is a perpetual calendar. The date dial compensates for the varying number of days per month and is self-correcting for the leap years.