There are 4 Aviat PITTS S-1T 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 1991 and 1995.
N31WK
1995 Aviat INC PITTS S-1T
Los Angeles, CA
N666BM
1991 Aviat INC PITTS S-1T
Snellville, GA
N58CT
Aviat INC PITTS S-1T
Parkland, FL
N91TH
Aviat INC PITTS S-1T
Denver, CO