The Q-Jet DID have a good run: 1965 - 1985 (21 years).
Other models that come to mind:
Carter BB 1932 - 1964 (33 years)
Carter BBS 1954 - 1983 (40 years)
Carter BBD 1952 - 1989 (48 years)
Carter YF 1951 - 1982 (32 years)
Carter AFB 1957 - 1984 (28 years) (I don't count the AFB-clones still being made today)!
Stromberg WW 1952 - 1974 (23 years)
Stromberg SF 1932 - 1968 (37 years)
There are others.
Jon.
