Date: 1960. Owner unknown
Models after 1948 didn't have rolled tone holes. The 10M models produced from 1959 onwards weren't called "Naked Lady" anymore, but "Artist".
What Conn said in 1959:
This "Tenor saxophone standard of the world" offers built in "total tenor tone" and has outstanding player acceptance. Extra hard durocast nickel finish keys on long hinges meet the demand for smooth, fast action. "Tailored" keys fit hands and fingers for perfect "feel" and proper lift. Features: balanced total tone, adjustable pivots, Res-O-Pads, convenient table keys, drawn tone holes, polished nickel plate Durocast keys, LUSTRE-CONN finish.