A. Lange & Söhne L121.1
High confidenceReplaced the L901.0 twenty years after the original. The instantaneous date jump is the field distinction and is observable by watching the watch at midnight: on the L121.1 both discs snap over together, where the earlier caliber's change is progressive.
Specifications
- Movement manufacturer
- A. Lange & Söhne
- Production
- 2015–present
- Frequency
- 21,600 vph (3 Hz)
- Jewels
- 68
- Power reserve
- 72 hours
- Winding
- manual
- Complications
- Outsize date · Power reserve · Small seconds
Architecture
The redesigned Lange 1 caliber, retaining the outsize date and power reserve with an instantaneous date change and a free-sprung balance with an in-house hairspring.
Related calibers
Preceded by
A. Lange & Söhne L901.0
References using this caliber
- A. Lange & Söhne 191.032Factory
Lange 1 · Whole production
Provenance of this record
Sources & Evidence
Primary sourceManufacturer documentation
A. Lange & Söhne — collection and caliber specifications
Lange Uhren GmbH, Glashütte
- Accessed
- 2026-08-18
Cited for
This referenceHigh confidence
Last verified: Not yet reviewed