Reference 1463 was produced from 1940 until circa 1965. One of the most coveted of all Patek Philippe chronograph references, it is especially favoured for its water-resistant type case with rounded pushers and screw-down case back. The cases of the reference 1463 were made for Patek Philippe by Taubert (formerly Frerès Borgel) who were specialised in the manufacture of first quality water-resistant type watch cases. The addition of a dust or humidity proof cover further helped to protect the watch movement. For an archive image of a reference 1463, see Huber, M., & Banbery, A., Patek Philippe Wristwatches, Second Edition, p.267, pl.412.