Definition of the author and the time
 

"Portrait of a Lady. Canvas, maslo.16 x 22. Reversible sketch. Signature illegible. Texture Canvas: improve the picture. Are there any suggestions on time and the author.

If the first letter read as "B" (according to your photo such probability is), the author may Kavetsky Malkin (born 1923), artist films. In the ranking it is, but, unfortunately, a sample of his signature I have.