Production chronology1898–1900
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗3 years
Four-wheel derivative of the motor tricycle, replacing its single front wheel with two front wheels and placing a passenger seat between them. F. R. Simms specified a surviving/photographed example carrying a Maxim gun, an important precursor to armoured motor vehicles; that weapon installation is a commissioned configuration, not a separate production model.
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.