^ Help identifying artist

[Konstantin]

Please provide details as proposed now for the following:

1. Author. (You do not need to fill in )
2. Material and equipment manufacturing ( oil on canvas , cardboard , paper, pastels , watercolors , lithographs , oil, pencil , etc.).
3. Size ( horizontal x vertical for painting).
4. Creation time (1899 /early. , Mid twentieth century. And so on).
5. Captions, labels , stamps, birochki (if available - be sure the photo).
6. State ( breaks, debris , scrapes ).
7. Expert opinion ( if any) - Name of organization + expert.
8. High-quality photograph of the picture , the back of the painting, photo captions ( if available ).
9. Origin of the picture.
10. Any other information useful for the attribution of the painting.