There are 3 Christen Industries PITTS S-2S 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.
N15PU
1989 Christen Industries INC PITTS S-2S
Valley City, ND
N1LU
1989 Christen Industries INC PITTS S-2S
Lewes, DE
N156CB
Christen Industries INC PITTS S-2S
Carson City, NV