There are 5 Aero Commander 600 S-2D 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 1966 and 1967.
N1791S
1967 Aero Commander 600 S-2D
Sebastian, FL
N1792S
1967 Aero Commander 600 S-2D
Forsyth, MT
N411H
1967 Aero Commander 600 S-2D
Marquette Heights, IL
N1725S
1966 Aero Commander 600 S-2D
Forsyth, MT
N8701V
1966 Aero Commander 600 S-2D
Havana, IL