Lemania CH27

The Lemania CH27 (27 CHRO) family is one of the most celebrated chronograph movements in horological history. The designation '27 CHRO' refers to the 27mm diameter chronograph project jointly developed by Lemania and Omega starting in the 1940s. The family includes various suffixes: C12 indicates 12-hour totalizer, T indicates tachymeter scale. Known caliber numbers include 2510 (without Incabloc) and 2520 (with Incabloc and 12-hour totalizer). This movement has powered chronographs from earth to the moon, used by Omega (as 321), Patek Philippe (as CH 27-70), Vacheron Constantin (as 1141), Audemars Piguet, and Breguet. Features the distinctive column wheel design and 'wishbone' bridge that makes it instantly recognizable.