Help with information on the portrait.
 

Dear experts!
Share your information about this portrait, if imeetsya.Karton, oil, size 21H16. Needless to give the scientific expertise)) Does assumptions about the author and the person depicted a woman?

A-K, an interesting portrait.
Chance to identity, and the more likely it is not a lot of authorship.
Over time, assuming the 40-60s.
Connoisseurs will correct what is wrong.
From SW.

Only to determine the approximate time of writing, the portrait and some possible terms, school and country.

The picture of Peter, on the reverse side is the inscription in pencil-old, trying to analyze it))

But I would have dated the '70s.
 
XIX century, of course.

Yes.
I agree.
Your dating is more accurate.
From SW.