There are 9 Colonial C-1 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 1948 and 1964.
N9439H
1964 Colonial C-1
East Aurora, NY
N24HA
1957 Colonial C-1
Aberdeen, SD
N253B
1957 Colonial C-1
Brant Lake, NY
N254B
1957 Colonial C-1
Ovid, MI
N256B
1957 Colonial C-1
Grand Haven, MI
N263B
1957 Colonial C-1
Hudson, WI
N257B
1956 Colonial C-1
Bridgeport, TX
N6595K
1948 Colonial C-1
Sag Harbor, NY
N265B
Colonial C-1
Aberdeen, SD