Author of the picture? Examination, restoration?

[Mikas]

Welcome.
The painting was bought in Potsdam in 1946 in an antique shop in a relatively small price and a engraving of horses.
At the time of purchase, the picture was already in poor condition, the frame of the picture rather old.
Painting apparently little-known artist and great pricing is not.
But interest in it is, the picture is like and have the desire to carry out restoration, but before this examination, in order to know when it might be written and who predpolorzhitelno author.
Maybe someone has an idea of their estimated time of writing and ownership of the paintings.

On the reverse side looked, but there is nothing.

Thank you.