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The Audemars Piguet 3120/3126 Movement Pallet Fork is a precision‑engineered component serving as the critical intermediary in the Swiss lever escapement of AP‘s renowned self‑winding calibres. Designed for the manufacture 3120 (the brand’s high‑end “workhorse” since 2003) and for the 3126/3840 chronograph (built on the 3120 base with a Dubois‑Depraz module), this forked steel part interacts directly with the escape wheel and the balance wheel to convert the mainspring’s raw torque into accurately dosed impulses, ensuring stable rate and amplitude.
As a direct‑fit replacement, it is the definitive choice for restoring the original escapement precision and reliability of these iconic Audemars Piguet movements.
Dual‑calibre compatibility – Fits both the base Calibre 3120 and the chronograph Calibre 3126/3840, which share the identical escapement architecture.
Heart of the lever escapement – Receives impulses from the escape wheel and transfers them to the balance, regulating the release of mainspring energy.
Precision steel construction – Manufactured from high‑grade steel and finished to AP‘s stringent tolerances, ensuring stable and accurate long‑term operation.
Drop‑in replacement – Engineered as an exact‑fit substitution for a worn or damaged original pallet fork; no modification to the movement’s escapement is required.
| Parameter | Value / Notes |
|---|---|
| Compatible calibres | Audemars Piguet 3120 and 3126/3840 (escapement geometry identical) |
| Component type | Pallet fork / lever (anchoring part of the lever escapement) |
| Material | High‑grade steel |
| Movement base | 3120: 26.60 mm dia, 4.26 mm thick, 40 jewels, 280 parts, 60h power reserve |
| Chronograph variant | 3126/3840: 29.92 mm dia, 7.16 mm thick, 59 jewels, 365 parts, 50h power reserve |
| Common frequency | 21,600 vph (3 Hz) for both movements |
| Type | Aftermarket replacement (generic) |
Replacement of a worn, chipped or damaged pallet fork during a full service or restoration of an Audemars Piguet Calibre 3120 or 3126/3840.
Ideal for Royal Oak (e.g. refs. 15300, 15400, 15450, 15500), Royal Oak Offshore Chronograph (e.g. refs. 26290, 26400, 26470) and Jules Audemars models equipped with these calibres.
Professional watchmaking use; the escapement area requires precise oiling and the pallet fork’s interaction with the guard pin and impulse pin must be set correctly.
Q1: Is this a genuine Audemars Piguet part?
No, this is a generic aftermarket replacement, not manufactured by AP. It is designed to match the mechanical specifications of the original pallet fork.
Q2: Which calibres is this pallet fork compatible with?
It fits the Audemars Piguet Calibre 3120 (three‑hand automatic) and the chronograph Calibre 3126/3840 – both share the same escapement architecture. Always verify with your specific movement reference before purchase.
Q3: Is the quality reliable for a professional repair?
Yes, when sourced from a reputable supplier. The fork is manufactured from steel and designed to meet the original escapement geometry. For museum‑grade restorations that demand absolute factory authenticity, genuine OEM parts are recommended.
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