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Girard-Perregaux 31

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Basic Information

Name	Girard-Perregaux 31
Manufacturer	Girard-Perregaux
Launch Year	1960
Caliber Family	Description first generation 30: manual wind 31: automatic 32: automatic, date 33: manual wind, date suffix A, .5, .7: 36000A/h escapement and setting mechanism redesigned, hack feature 40: manual wind 41: automatic 42: automatic, date 43: manual wind, date suffix .1, .4: 36000A/h Related calibers Girard-Perregaux 30, Girard-Perregaux 30.09, Girard-Perregaux 30.4, Girard-Perregaux 30.5, Girard-Perregaux 30.6, Girard-Perregaux 30.7, Girard-Perregaux 31, Girard-Perregaux 31.09, Girard-Perregaux 31.19, Girard-Perregaux 31.29, Girard-Perregaux 31.4, Girard-Perregaux 31.5, Girard-Perregaux 31.7, Girard-Perregaux 31.8, Girard-Perregaux 31.9, Girard-Perregaux 31A, Girard-Perregaux 32, Girard-Perregaux 32.09, Girard-Perregaux 32.19, Girard-Perregaux 32.29, Girard-Perregaux 32.4, Girard-Perregaux 32.5, Girard-Perregaux 32.7, Girard-Perregaux 32.8, Girard-Perregaux 32.9, Girard-Perregaux 32A, Girard-Perregaux 33, Girard-Perregaux 33.09, Girard-Perregaux 33.5, Girard-Perregaux 33.6, Girard-Perregaux 33.7, Girard-Perregaux 40.0, Girard-Perregaux 41.0, Girard-Perregaux 42.0, Girard-Perregaux 42.1, Girard-Perregaux 42.2, Girard-Perregaux 42.3, Girard-Perregaux 42.4, Girard-Perregaux 43.0
Is COSC certified	No

Timegrapher

Beat rate

21,600 bph

Frequency

3 Hz

Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.

Technical Details

Lignes Dimensions	11.5 ‴
Dimensions	26 mm
Height	4.8 mm
Further Measures	Mounting Diameter (Dm): 25.6mm Stem height (T): 1.7mm Mounting Height (F): 1.1mm
Power Reserve	40 hours
Frequency	21,600 vph
Jewels	39

Complications and Specifications

Shape	Round
Complications	Sweep Second
Shock Protection	Incabloc
Regulator Type	Pinned Regulator (or Index Regulator)
Movement Type	Automatic
Rotor Type	Central Rotor
Escapement Type	Swiss Lever
Control Type	Balance Wheel
Winding Type	Automatic (Rotor-Driven)
Setting Type	Stem Set (Crown Pull)

Additional Information

Hand Sizes	1.50 x 0.90 x 0.21mm
Hand Count	3
Country Of Manufacture	Switzerland
Notes	Remarks: automatic with two roller freewheels regulation gear The family is based on the manual wind calibre AS 1687/1688. The automatic mechanism is a joint development of Doxa, Eberhard, Favre-Leuba, Girard-Perregaux, and Zodiac. differences not known between 31, 31.09 Other data: balance staff: U2839 stem: W2837 mainspring / battery: 1.10 x 10.0 x 0.11mm Ranfft mentioned about this caliber: There are variants with this quantity of jewels 17, 39
Signature	ca. 1960: GXM, 3109127, Girard-Perregaux Gyromatic, Swiss, 17 Jewels; Incabloc (Girard-Perregaux 31.09)
Import Codes	UWP — Palmer Sales Corp., S.A. Montres Jaquet & Girard

Compatible Parts

488 other caliber(s) share compatible parts with this caliber.

69 compatible part(s) available — Supporter feature.

Metadata

Created At	Sep 15, 2023
Updated At	Apr 23, 2025, 11:32:48 PM