Production chronology1928
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗1 year
Single source-listed experimental successor built during the AL3 production period but not adopted for series manufacture.
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.