PF331

	Brand:	Parmigiani Fleurier
	Family:	PF331 Family
	Height:	3.50 mm
	Jewels:	32
	Reserve:	55 hours
	Frequency:	28,800 A/h
	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
Central-Rotor Automatic Clockwise Balance Cock Balance Balance at 7:30 Barrel at 12:00 Barrel at 1:30 Central Rotor
Production: 2001 – Current
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

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

Cal. PF331-QF is a Qualité Fleurier and COSC-certified chronometer version .

• Parmigiani Fleurier Toric Qualite Fleurier, Ref. PFC422

Cal. PF441

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.

Hermès P1928

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.

Hermès H1837

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.