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Berna / Model record
BernaU39 D
ProductionUnknown
Recorded originSwitzerland
ClassTruck chassis
Specific U-series designation preserved by the model register; exact dates and payload are unresolved.
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: production chronology, attributed imagery. Fields we cannot source stay empty rather than guessed.