Zenith

For this thread, I’m testing a new presentation mode with the text coming gradually with the photos.

A/ Zenith Calibre 135

Presented in 1948, the Zenith Calibre 135 was created by Ephrem Jobin (born in 1909, cf. image below) and specifically developed to meet the norms of the Neuchâtel Observatory competitions.

The caliber 135 was designed with a 30 mm diameter (the maximum dimension to enter the wristwatch category competition) and a 5 mm height. The idea was to have an extremely large 14 mm balance wheel to enhance precision and rate stability, and a large barrel to deliver consistent power to the regulator.

This movement also enabled the brand to win numerous chronometry awards: it garnered 230 honours, many of which were first prizes, including five consecutive first prizes for chronometry in the wristwatch category (from 1950 to 1954) certified by the Neuchâtel Observatory.

B/ The 2022 Phillips-Voutilainen-Zenith Calibre Observatoire Limited Edition (10 pcs), ref. 40.1350.135/21.C1000

Among  the different versions of the Zenith Calibre 135, the 135-O movements were iterations made solely for participating in chronometry trials at the Observatories of Neuchâtel, Geneva, Kew, Teddington and Besançon.

Ten of these original observatory-tested 135-O movements, belonging to the historical 1950-1954 serial winning years, have been restored in 2022 for a modern limited edition released by Zenith in collaboration with Phillips and Kari Voutilainen. The ten watches have a 38 mm 950 platinum case.

C/ Zenith's new G.F.J. Calibre 135, ref.  40.1865.0135/51.C200

For Watches & Wonders 2025, Zenith releases a limited edition of 160 pcs named after the initials of the brand’s founder Georges Favre-Jacot (G.F.J.).

The case is made of 950 platinum and measures 39.15 x 10.15 mm with 45.75 mm lug-to-lug.

The dial is made of blue bricks guilloché on the outer ring, lapis lazuli in the centre and blue mother-of-pearl small second counter (18k gold applied indices & faceted hands).

The watches are powered by a reworked version of calibre 135 with 160th anniversary bricks guilloché decoration. It is, of course, chronometer certified and beats at 18,000 vibrations/hour (2.5 Hz). Power reserve is 72 hours.

Three straps are delivered with each watch: a dark blue alligator leather strap with platinum pin buckle, black calfskin leather and blue Saffiano calfskin leather. Upon request, an optional platinum bracelet with double folding clasp is available.