There are 7 Pitts Special S-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 1967 and 1973.
N1JE
1973 Pitts Special S-1
Lebanon, TN
N39RL
1972 Pitts Special S-1
Edgewater, FL
N67D
1972 Pitts Special S-1
Rch Palos Vrd, CA
N781
1972 Pitts Special S-1
Saint Augustine, FL
N77XX
1971 Pitts Special S-1
Yuma, AZ
N1114R
1967 Pitts Special S-1
Pensacola, FL
N7713
Pitts Special S-1
Vineland, NJ