Curated: Calibre: the precise anatomy of a movement

The worlds of watchmaking and firearms have more than one thing in common: the need for precision and use of the word calibre. So why is a watch mechanism called a calibre? Jack Forster explains why

The word calibre has a number of different meanings, but in watchmaking the word is synonymous with movement. Across the entire industry, one of the few absolutely ubiquitous practices is to call a movement “calibre XYZ123”. It’s one of those words you can see a million times in the world of firearms and the world of watchmaking, which would seem to have little in common.

The use of the word calibre in the ...