Una Merkel was a popular supporting actress in many movies of the 1930s and 1940s. She continued her acting on tv shows right into the 1970s.
I never got around to writing to her while she was still alive, and regretted it, as I wanted to tell her of my enjoyment of her portrayals of various characters, both comedic and dramatic.
In 1989, I purchased the photo seen below from an autograph dealer. It's a post card photo, and the postmark on the back is "Los Angeles, Calif. - April 12, 1937".