There are 6 Cessna C-37 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 1937 and 1938.
N18599
1938 Cessna C-37
Clearwater, KS
N17086
1937 Cessna C-37
Cheney, WA
N17090
1937 Cessna C-37
Bemidji, MN
N17057
Cessna C-37
Bemidji, MN
N18035
Cessna C-37
Bemidji, MN
N18591
Cessna C-37
Marion, TX