A calibre is a watch movement or the designation used to identify its design.
A watchmaker can identify a movement by its calibre designation. This matters when two watches look similar from the outside. The case and dial describe what the wearer sees, while the movement determines which parts and service procedures the watchmaker needs. In a mechanical watch those parts include the barrel, the train of wheels and the escapement. A movement designation and the reference of the finished watch answer different questions.
In job listings
Richemont used the spelling calibers in a Mississauga watchmaker listing. It asked for experience overhauling complex movements and for continuing training on additional calibres. The wording describes the range of mechanisms the watchmaker can service. A reference to high-calibre talent elsewhere in an advertisement has a different meaning. Search local jobs for “watchmaker”.
