SIGNED /INSCRIBED by Myrna Loy BAREFOOT IN THE PARK Neil Simon 1965 Playbill San Francisco
The production opened October 23rd, 1963 at the Biltmore Theatre in New York City and ran for 1530 performances while simultaneously playing on the road.
This is from the February 27, 1965 Geary Theatre, San Francisco production ;

Myrna Loy, Richard Benjamin, Joan Van Ark, Sandor Szabo ; directed by Mike Nichols