I found your site while researching Sanabria Televisions. My grandmother was a singer in the 1930s, and I came across a 1934 ad in the Cleveland Plain Dealer for a Sanabria broadcast that included her as one of the talent being showcased.

My grandmother is pictured in the bottom row, center (her stage name was Chita Lozano. Her real, less exotic name was Betty Bleich).