There are 5 Waco VKS-7 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 1941.
N2309
1941 Waco VKS-7
Southampton, NJ
N31651
1941 Waco VKS-7
Plymouth, MA
N29372
1940 Waco VKS-7
Goshen, OH
N17700
1937 Waco VKS-7
Clayton, NC
N20900
Waco VKS-7
San Pierre, IN