Accompanied by Patek Philippe Extract from the Archives confirming production of the present watch with two-tone silvered dial and steel Breguet numerals in 1941 and its subsequent sale on 2 August 1941.
This watch is thought to be one of only 13 examples of this reference in stainless steel known to date, out of which only four were fitted with a two-tone dial and Breguet numerals.
This watch bears a reference number, 530, usually reserved for the renowned oversized chronograph wristwatch, introduced into the market in 1938. However, research resulted in the discovery of the fact that reference 530 was used not just for the chronograph but also for a plain model without any complications. Whereas the present watch very much resembles a traditional reference 570, close examination shows differences in case proportions such as a larger diameter of 36.5 mm.
Examples of a "time only" reference 530 in stainless steel with two-tone silvered dial and applied Breguet numerals, confirmed by the Extract, are extremely rare. Another example of such a dial, on the less exotic reference 570 though, is illustrated in Patek Philippe - Wristwatches by Martin Huber & Alan Banbery, second edition, p. 169.
The celebrated model with its charismatic dial served as inspiration for the creation of the platinum Calatrava model, reference 5169P.