Production chronology1920–1929
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗10 years
← Berna
Berna / Model record
BernaE
Production1920–1929
Recorded originSwitzerland
ClassTruck chassis
Independent 1920s E-series commercial chassis and parent identity for the documented E4 and E5 derivatives.
Chronology ledger
Dates with their meaning intact
Record depth — Documented
How this is measured → 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.