With Patek Philippe Extract from the Archives confirming production of the present watch with silvered dial, yellow gold Arabic and "clous" numerals in 1951 and its subsequent sale on 18 July 1952. Furthermore delivered with an invoice for the overhaul of the watch by Patek Philippe Geneva in 2006.
Reference 1526, highly appreciated by collectors and immediately recognisable by its Calatrava-style case, was launched in 1941. According to literature, only 210 examples were made, the majority in yellow gold.
Reference 1526 is illustrated in Patek Philippe Wristwatches by Martin Huber & Alan Banbery, second edition, pp. 282 & 283.