Jaeger-LeCoultre 920
High confidenceNever used by Jaeger-LeCoultre in its own watches. Supplied to Audemars Piguet (2120/2121), Patek Philippe (28-255) and Vacheron Constantin (1120/1121), which is why the Royal Oak, Nautilus and 222 share an architecture. Quoted height varies with execution: around 2.45 mm without date and around 3.05 mm with.
Specifications
- Movement manufacturer
- Jaeger-LeCoultre
- Production
- 1967–?
- Jewels
- 36
- Diameter
- 26 mm
- Height
- 2.45 mm
- Winding
- automatic
Architecture
Ultra-thin automatic with a full-size peripheral-riding rotor mounted on ceramic ball bearings rather than on a central post — the arrangement that lets a full rotor fit within the height.
Authentication notes
- RotorHigh confidence
Peripheral rotor on ball bearings
The 920 family's rotor rides on a bearing race rather than a central post. A conventionally mounted rotor in a watch presented as carrying this caliber is inconsistent with the architecture — a strong indicator, though one that requires the caseback off and a clear view of the rotor mounting.
Related calibers
Derivative
Audemars Piguet 2121Derivative
Vacheron Constantin 1120Derivative
Patek Philippe 28-255
References using this caliber
No catalog references are linked to this caliber yet.
Provenance of this record
Sources & Evidence
Revolution — I Am Legend: The Jaeger-LeCoultre Calibre 920
Revolution Watch
- Accessed
- 2026-08-18
Cited for
2.45mm thick without date, 36 jewels, 26mm (12.5 lignes) in diameter.
Last verified: Not yet reviewed