Production chronology1921
Sourced production or model lifecycle range used by the main catalog timeline.
curated ↗1 year
← Ace
Ace / Model record
AceModel H Six
Production1921
Recorded originUnited States
ClassTouring car
Power68 hp
Conventional-engined 1921 Ace touring model, introduced with a 288.6 cu in Herschell-Spillman straight-six and 117-inch wheelbase.
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.