Rico Tomaso's "Lady of Seville"

This is titled "Lady of Seville" by Rico Tomaso. On the back, there's a label of the Illinois Moulding Company, Windsor Art Products of Los Angeles. There's also a number:  CB2814-66

It's in good condition. The paper on the back has wear from age, fron the frame and painting itself is in food shape. The color has slight fade, also from age. 

Please advise on what you think the value is. Thanks!