SIGNED PATEK PHILIPPE, GENEVE, REF. 3445, MOVEMENT NO. 1’231’949, CASE NO. 332’097, MANUFACTURED IN 1972

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.