Approx. Ø33mm, 18K gold, print bottom, serial number 652738, work number 867222, base with reference number, very rare work with fine regulation, adjusted in 8 layers, wonderfully preserved dial, original hands, leather strap with pin clasp, very well preserved and functional, with probably original box. The Ref. 533 is one of the most popular Patek Philippe chronographs of the 1940s, produced from 1937 (https://www.cortrie.de/go/GZD).