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Generic barrel complete for Audemars Piguet Calibre 3120 and 3126/3840 automatic movements. This pre‑assembled mainspring barrel unit stores and releases energy to drive the gear train, ensuring stable power delivery. Aftermarket replacement for worn or damaged original barrels.
Pre‑assembled unit – includes barrel, mainspring, and arbor.
High‑grade steel construction – durable and wear‑resistant.
Restores original power reserve – 60h (3120) / 50h (3126).
Drop‑in replacement – no need to handle mainspring separately.
Affordable alternative to genuine OEM part.
| Parameter | Value |
|---|---|
| Compatible calibres | AP 3120, 3126/3840 |
| Component type | Barrel complete (mainspring assembly) |
| Material | High‑grade steel |
| Movement data (3120) | 26.60 mm dia, 4.26 mm thick, 40 jewels, 21,600 vph, 60h power reserve |
| Movement data (3126) | 29.92 mm dia, 7.16 mm thick, 59 jewels, 21,600 vph, 50h power reserve |
| Type | Aftermarket |
Replace worn or damaged original barrel during full service of AP 3120/3126 movements.
Suitable for Royal Oak, Royal Oak Offshore, and Jules Audemars models.
Professional watch repair and restoration.
Q1: Genuine AP part?
No, generic aftermarket replacement.
Q2: Which calibres does it fit?
3120 (three‑hand) and 3126/3840 (chronograph).
Q3: Why replace the complete barrel?
Worn mainspring or barrel wall can reduce power reserve and amplitude. New complete unit restores performance.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
