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 1946 and 1948.
N4364E
1948 Aeronca 7EC CONV
Auburn, CA
N83948
1946 Aeronca 7EC CONV
Centerville, TN
N84294
1946 Aeronca 7EC CONV
Maumelle, AR