Accompanied by Patek Philippe Extract from the Archives confirming the production of the movement of this watch with sweep centre seconds in 1914. It furthermore confirms the gilded dial and radium numerals. The movement was encased in 1928 and sold on 4 December 1929.
This watch is fitted with a 12 lignes and 18 jewels movement with the rare addition of sweep centre seconds. It is thought that less than 10 examples of this model with centre seconds were made.
Standard examples without centre seconds are illustrated in Patek Philippe - Wristwatches by M. Huber & A. Banbery, 2nd edition, pp. 104, 108 and 109.