Glossary of watch terms

* calibre  refers to the movement. The Lépine (or open-face) calibre dispenses with the fusee and to have replaced the top plate and pillars with bridges. This made room for the balance inside rather than on top of the mechanism, resulting in a much thinner movement. Also, the Lépine seconds hand is in line with the winding-stem as opposed to the Hunter calibre in which the seconds hand is on an axis from 3 to 9 o'clock, at right angle to the winding stem.



* "ébauche" refers to an incomplete or unassembled watch movement and its associated components.



* "Manufacture" is a company who produces at least one movement in house. Examples of "manufacture" watch companies producing one or more movements in house include Audemars Piguet, Glashutte, Chopard, Girard-Perregaux , Roger Dubuis  , Piaget , A. Lange & Sohne, Jaeger Le-Coultre, Minerva, Parmigiani, Patek Philippe, Rolex, Vacheron & Constantin, and Zenith.



* Ligne is an old unit of measurement in watchmaking. One lingne equals 2.2558mm, rounded up to 2.26mm. A foot (') measured 12 inches ('') of 12 lignes (''') each.