There are 7 Stearman Aircraft C3-R 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 1929 and 1931.
N566Z
1931 Stearman Aircraft C3-R
Hernando, FL
N799H
1931 Stearman Aircraft C3-R
Crystal Lake, IL
N790H
1930 Stearman Aircraft C3-R
Pleasant Prairie, WI
N794H
1930 Stearman Aircraft C3-R
El Cajon, CA
N8828
1929 Stearman Aircraft C3-R
Greenfield, IA
N8840
1929 Stearman Aircraft C3-R
Wapato, WA
N656K
Stearman Aircraft C3-R
Mount Pleasant, TX