A calibre is a watch movement or the designation of a particular movement 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
Harrods used the plural calibres in a Hammersmith watchmaker listing. The job covered servicing Rolex movements for which the watchmaker had been trained. Here the word identifies the movements this watchmaker is trained to service. In a recruitment advertisement, high-calibre candidates is a description of people. Search local jobs for “watchmaker”.
