With Patek Philippe Extract from the Archives confirming dates of production and sale.
Reference 1450, also known as the "Top Hat" amongst collectors, was in production from 1940 until the 1960s. The model is illustrated in Patek Philippe Wristwatches by Martin Huber & Alan Banbery, first edition, p. 113, pl. 158, second edition, p. 137, pl. 196.