PATEK PHILIPPE. AN EXTREMELY FINE, HIGHLY IMPORTANT AND THE FIRST 18K GOLD TWO CROWN WORLD-TIME WRISTWATCH WITH 24 HOURS INDICATION AND FIRST TIME SEEN WAVED GUILLOCHE GOLD DIAL

PATEK PHILIPPE. AN EXTREMELY FINE, HIGHLY IMPORTANT AND THE FIRST 18K GOLD TWO CROWN WORLD-TIME WRISTWATCH WITH 24 HOURS INDICATION AND FIRST TIME SEEN WAVED GUILLOCHE GOLD DIAL
SIGNED PATEK PHILIPPE, GENEVE, REF. 2523, MOVEMENT NO. 720'300, CASE NO. 305'699, MANUFACTURED IN 1953
Movement: Cal. 12-400 HU, manual
Dial: Guilloché gold centre, outer silvered revolving ring with names of 41 world cities adjusted by the crown at 9
Case: Snap on back, 35.5 mm.
With: 18k gold Patek Philippe buckle, Extract from the Archives confirming production of the present watch with raised gold indexes and guilloché gilt centre in 1953 and its subsequent sale on 8th October 1958, Study by Eric Tortella, 2021
Remark: First example of the reference

Provenance
Four ref. 2523 are displayed in the Patek Philippe Museum in Geneva.

Ref. 2523 watches are illustrated in: Patek Philippe Wristwatches, Martin Huber and Alan Banbery, 1998 edition, pp. 240 to 242.

Other examples are illustrated in: Patek Philippe Museum book, 2014 edition, Volume 2, pp.345 & 346.

Ref. 2523 watches are illustrated in: Blue Book 2, Eric Tortella, 2019 edition, pp. 354 to 399.