Cal. 1185 (also called FP 11.85, Piguet, F. Piguet, etc) is an automatic column wheel chronograph movement produced by Frédéric Piguet. It is widely used by high-end watch manufacturers including Blancpain, Audemars Piguet, Cartier, and Chopard. It is based on the hand-winding Cal. FP 1180 which was introduced a year earlier as the thinnest column wheel chronograph movement ever produced.

Cal. FP 1185 includes many high-end features, including a column wheel, vertical clutch, ball bearing rotor, Triovis micrometer regulator, and Kif Ultraflex anti-shock. The uni-directional automatic winding runs clockwise.

Cal. 1185 was the basis for many other movements:

Audemars Piguet Cal. AP 2385
Blancpain Cal. 68F5
Blancpain Cal. F185
Cartier Cal. 205
Vacheron Constantin Cal. VC 1137
Note that Omega uses a F. Piguet ebauche for many of their chronograph movements. This is called Cal. FP 1285 and is quite similar to this Cal. 1185 but is thicker and has a 28,800 A/h beat rate. Cal. FP 1285 also switches the 12 hour register and small seconds. These are known as Omega Cal. 3301, 3303, and 3313.

Watches using the F. Piguet Cal. FP 1185 include the following:

Alain Silberstein Bolido Krono
Blancpain Leman Chronograph, Ref. 2100
Breguet Marine Chronograph (known as Cal. 576)
Cartier Pasha Chronograph, Ref. 2113
Franck Muller Conquistador Chronograph, Ref. 8000
Harry Winston Premier Chronograph
Panerai Luminor Chronograph 2000, PAM045 (known as Cal. OP V)
Panerai Luminor Chronograph AMG, PAM105 (known as Cal. OP V)
Daniel Roth Papillon Chronograph (highly modified)
Gérald Genta Octo Chrono Quattro Retro (highly modified as Cal. GG7800)