With Patek Philippe Extract from the Archives confirming production of the present watch in 1965 and its subsequent sale on 17 December 1965.
Fresh to the market this reference 3445 is furthermore preserved in very good original overall condition.
Reference 3445, Patek Philippe's first calendar watch made in series, was in production from 1961 to 1981. The model and its calibre 24-460 M movement are illustrated in Patek Philippe Wristwatches by Martin Huber & Alan Banbery, first edition, pp. 220 & 221.