This watch is accompanied by a Patek Philippe Extract from the Archives confirming production in 1971 and its subsequent sale on November 19th of the same year.
Patek Philippe began production of reference 3448 with the 27-460 Q calibre movement in 1962. Only 586 examples were made.
A similar watch is illustrated in Patek Philippe Wristwatches by Martin Huber & Alan Banbery, 2nd edition, p. 288. It is also featured in Ore d'Ore by Jader Barracca, Giampiero Negretti and Franco Nencini, p. 45.