The watch brand from Le Locle has an impeccable reputation for producing high-precision chronometers. This is demonstrated by the numerous victories won by Zenith manufactory movements in timekeeping competitions organised by European observatories in the 1950s. One of these winning calibres was the Calibre 135-O. It was produced between 1949 and 1962 in two versions: commercial and competition.

Today, 70 years later, it is the second version of the historic calibres, which have never been sold, that the new collector’s wristwatches have decided to offer. The initiative was sponsored by Aurel Bacs and Alexander Ghotbi of the auction house Phillips.

Ten Calibre 135-O hand-wound watches produced between 1950 and 1954 have been selected for the limited edition. Their restoration and finishing was entrusted to renowned independent watchmaker Kari Voutilainen. The ten updated calibres are housed in a 38mm diameter platinum case. The noble black dial bears the serial number of the movement, testifying to the uniqueness of each Calibre 135 Observatoire Limited Edition.

Photo: press-office