Production chronology1912–1914
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗3 years
One of two final sleeve-valve models; exact displacement is not exposed by the surviving range table.
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.