Watches + Dictionary = Watchionary
Calibre 2120, Jointly developed by LeCoutre & Cie, Audemars Piguet and Vacheron Constantin, www.apchronicles.audemarspiguet.com
Calibre is a term that pertains to the internal mechanism or the movement of a watch or a clock. Initially, it was only used to denote the size of the movement. However, nowadays, it also signifies a particular model of movement that can be employed in various kinds of watches or clocks.