There are 7 Waco DSO 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.
N605N
1929 Waco DSO
Sonoma, CA
N762K
1929 Waco DSO
Faribault, MN
N8558
1929 Waco DSO
Fort Denaud, FL
N204M
Waco DSO
Sonoma, CA
N629N
Waco DSO
Kalispell, MT
N8538X
Waco DSO
Fairfield, OH
N8599
Waco DSO
Hood River, OR