Looking at the photos in post #1, I was sure that any added front derailleur was going to need to be modified to clear the pump peg; seeing the follow-up photos, clearly not.
Very cool bike.
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Larry:1958 Drysdale, 1961 Gitane Gran Sport, 1974 Zeus track, 1988 Masi Gran Corsa, 1974 Falcon, 1980 Palo Alto, 1973 Raleigh Gran Sport, 1974 Legnano. Susan: 1976 Windsor Profesional.