Blancpain “Les six pièces maîtresses de l'art horloger”

European Watch Clock and Jewellery Fair 1991 BF 210
Blancpain has now brought together in the same giftbox the six masterpieces of mechanical watchmaking : 1) extra-slim calibre - 2) moon-phase calendar watch - 3) perpetual calendar watch - 4) chronograph with flyback hand - 5) 8-day tourbillon - 6) minute repeater. Only 99 of these giftboxes will ever be produced. Cased in platinum, these timepieces will be consecutively numbered from 1/99 to 99/99. (BLANCPAIN “The Six Masterpieces of the Watchmaker’s Art”)