There are 5 Pitts S-1C 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 1967 and 1982.
N11BP
1982 Pitts S-1C
Jacksonville, FL
N9AQ
1975 Pitts S-1C
Valley Center, KS
N3527
1971 Pitts S-1C
Raleigh, NC
N30125
1969 Pitts S-1C
Rock Rapids, IA
N1381
1967 Pitts S-1C
Snellville, GA