There are 3 Sopwith PUP 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 1968 and 1991.
N6205
1991 Sopwith PUP
Polk City, FL
N6018
1971 Sopwith PUP
Tukwila, WA
N5192
1968 Sopwith PUP
Saint Louis, MO