A. Lange & Söhne · Lange 1
L121.1
The hand-wound Lange 1 calibre, combining a twin barrel with an instantaneous outsize date.
At a glance
- Type
- Hand-wound mechanical
- Display / complication
- Outsize date
- Architecture
- Three-quarter plate, twin barrel
- Timebase
- 21,600 vph / 3 Hz
- Power reserve
- 72 h
Reference sources reviewed 7 November 2026. Published specifications, not independent measurements. Versions and complete-watch specifications can differ; fields without a verified figure are omitted or identified.
Find it in a watch
Lange 1 and Little Lange 1 with L121.1
An example from the linked references. Check the exact model and production generation.
What distinguishes it
Look beyond the reference.
The untreated German-silver plate, screwed gold chatons and hand-engraved balance cock make construction and finishing part of the story.
For the enthusiast
Introduced in 2015, this is a specific generation of Lange 1 movement. Do not assume every earlier Lange 1 contains L121.1.