|Winding:||Automatic, Central Rotor Automatic Winding, Clockwise Automatic Winding, Two Barrel, Uni-Directional Automatic Winding|
|Diameter:||25.60 mm (11.5 ligne)|
|© Parmigiani Fleurier||Complications:||Date|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 6:00, Small Seconds Hand at 6:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 2001 – Current|
Cal. PF331 is an automatic movement with date from Parmigiani Fleurier, their first in-house automatic movement. Introduced at SIHH in 2001, it was used in the Kalpa Grande Automatique since at least 2006 and in the Kalparisma for women since 2008. It is closely related to Cal. PF332 which features small seconds or a rotating star at 6:00.
Cal. PF331 features two mainspring barrels in series for 50 hours of power reserve. It has uni-directional automatic winding in the clockwise direction.
- Parmigiani Fleurier Kalpa Kalparisma, Ref. PFC123
- Parmigiani Fleurier Kalpa Grande Ouranos
- Parmigiani Fleurier Kalpa Grande Automatique
Cal. PF331 with Small Seconds
Cal. PF331 is also available with small seconds and date at 6:00. This version has the same number of components, jewels, power reserve.
- Parmigiani Fleurier Kalpa Kalparisma, Ref. PFC124
Cal. PF331-QF is a Qualité Fleurier and COSC-certified chronometer version .
- Parmigiani Fleurier Toric Qualite Fleurier, Ref. PFC422
Parmigiani reintroduced the Toric Chronomètre in 2017 with a COSC-certified version of Cal. PF331. In the next two years, this movement became known as Cal. PF441 instead.
Vaucher Fleurier has produced a version of Cal. PF331 for Hermès since 2004. Cal. P1928 is measured at 25.95 mm diameter (11.5 ligne) and 3.5 mm thick.
Vaucher Manufacture produces a version of Cal. PF331 for Hermès. Named Cal. H1837, it was used in the Hermès Dressage watch from 2012. Hermes also sold a version of Cal. PF332, with small seconds, which it also called Cal. H1837.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.