WThe Extract from the Archives, mentioned that this magnificent “Lord Kalla” watch was manufactured in 1990. The Kalla Collection In 1979 Vacheron Constantin presented what was then the most expensive watch in the world: the “Kallista” (for US$ 5 000 000.-). It was designed by Raymond Moretti (1931- 2005), French painter and sculptor, a friend of Pablo Picasso (1881-1973) and Jean Cocteau (1889-1963). A new generation of watches inspired by the Kallista, called “Kalla”, became available in the early 1980’s. “Lady Kalla” set with 108 emerald-cut diamonds, with 26 others on the dial, was specially designed and made for Diana (1961-1997), Princess of Wales, on the occasion of her marriage in 1981 to Prince Charles (b.1958). From 1988, the watches from the Kalla Collection were offered to the public, but always in very limited quantities and sometimes only one at a time. They were in white or yellow gold, for men or for ladies, and had either leather straps or diamond-set bracelets. The Vacheron Constantin designers showed great creativity; Among Haute Joaillerie watches, the Kalla Collection holds a special position, due largely to the audacity of the Kallista, but also to the great variety of models that were offered to the public, all different yet all sharing the common denominator of the lavish use of precious stones.