69. 69Y Breguet. An exceptionally rare and very fine 18K gold flyback chronograph wristwatch ordered for H.R.H Prince Poniatowski with family coat of arms engraved to back, only two produced Date: Purchased 18th April 1973 Movement: 17-jewel Valjoux Cal.720 flyback manual wind Dial: Brushed silvered, applied rose gilt 'Egyptian' diamond-shaped faceted hour markers with Arabic numeral 12, black outer 1/5th second divisions, black outer tachymetre scale, sunken subsidiary dials at 3, 6 and 9 for running seconds, 30 minute and 12 hour recording, gilt pointed baton hands, centre chronograph hand Case: Polished round, snap on back, coin edged band, crown flanked by two chronograph buttons, princely crest of the Poniatowski family engraved to back, No.535 Strap/Bracelet: Breguet black alligator leather strap Buckle/Clasp: 18K gold buckle Signed: Case, dial & movement Size: 36mm Weight: 57,95g Accompaniments: Original Breguet box, Breguet Extract from the Archives delivered 27th May 2013 One of the most refined expressions of Breguet's horological artistry, this Breguet No. 535 in 18K yellow gold is an exceptionally rare flyback chronograph, produced in only two known examples. Originally ordered for Prince Poniatowski, this watch combines historical significance with technical sophistication, making it a standout piece for collectors. The watch is powered by a Valjoux flyback movement, renowned for its reliability and precision, while the 18K yellow gold case and elegantly finished dial exemplify Breguet's signature aesthetic of clarity, balance, and refinement. The flyback function allows the chronograph to be reset and restarted instantly, highlighting the watch's practical ingenuity alongside its classic design. Beyond its technical qualities, this Breguet carries a story of provenance and exclusivity. Its rarity, paired with the distinguished history of its original owner, elevates it beyond a mere timekeeping instrument to a piece of horological heritage. This extraordinary example is offered with its original box and official Extract from the Archives, confirming its authenticity and enhancing its appeal to discerning collectors. With its combination of elegance, mechanical sophistication, and historical significance, this incredible piece represents a unique opportunity to acquire a chronograph of exceptional refinement and enduring prestige.