The two-day Zenith event, on 21 and 22 February, allowed five members of L'Orologio Club to cross the threshold of what is a real factory, with its original brick structure and dimensions suited to housing numerous machines. One of the most appreciated moments was the live viewing of all the stages in the manufacture of a calibre, which is the true speciality of the Maison, first and foremost the El Primero 3600, on which the next Zenith chronograph movements with complications will be developed.
The design of a new watch is the task of the research and development department. Here, dedicated software allows engineers to digitally construct a fully functioning model and test its feasibility. The next stage involves the creation of a Plexiglas model of the new mechanism, to test its correct mechanical functioning. If successful, the production of the prototypes is entrusted to the dedicated department. From prototyping, we move on to the manufacture of the components, starting with the plates, of which the most complex is naturally that of the El Primero chronograph. Operations range from progressive moulding to cutting on CNC milling machines.
Once the components are ready and finished, we move on to assembly with four watchmakers each working on a specific mechanism, be it time train, chronograph or automatic, until a calibre is completed. Finally, the movements are adjusted and the dial and hands are manually assembled, followed by the case setting and checking of the movement. Last operation: the assembly of the bracelets or straps, supervised by a manager who gives approval for the parts produced.
On the top floor, in an attic, behind a door that remained walled up from 1975 to 1982, Charles Vermont's hiding place is preserved intact. Here the brave and proud watchmaker had stored all the moulds, project plans and components available for the manufacture of Zenith calibres, including the El Primero. A year later, the House resumed production of its chronograph.
The experience at the Zenith manufacture in Le Locle ended with a Watch Clinic, where L'Orologio Club members were able to assemble part of the El Primero chronograph under the guidance of watchmaker Romain Mazzilli.
