In 1929, at a time when demand for luxury objects had dwindled
because of the international economic crisis, the Manufacture’s
watchmakers set themselves the challenge of creating the world’s
smallest watch movement. They miniaturised the Duoplan calibre
to the limit. The Calibre 101 weighed barely one gram and had 74
parts. Crafted in extremely small quantities, but in continuous
production, its record is still unmatched to date. For her
coronation in 1953, Queen Elizabeth II of England wore a watch
that used this superlative mechanism.