There are 3 Aeronca 7EC(CONV) aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1957 and 1961.
N9855Y
1961 Champion 7EC(CONV)
Seymour, IN
N62667
1959 Champion 7EC(CONV)
Columbus, GA
N731X
1957 Champion 7EC(CONV)
New England, ND