Production chronology1921–1923
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗3 years
Berlin-built narrow tandem two-seater balancing on its principal wheels with two small lateral support wheels. Sources differ between a 1921–1922 and 1921–1923 production envelope, so the broader period is marked approximate.
Sourced production or model lifecycle range used by the main catalog timeline.
This record contains useful sourced evidence, but it does not yet meet the reference-ready standard. Still needed: attributed imagery. Fields we cannot source stay empty rather than guessed.