Help identify the artist
 

Hello, please help to identify the artist and possible value of the work.

Thank :)

This monogram was at Kozma Petrov-Vodkin, but talking about ownership figures his hand very

There, a year and the 21st, when he was on Wed Asia traveled.

instead tells what may be the price?

Ксюшка, without proper attribution, there are five cents .. what does it Kn-In .. big somneniya.Vy even write a few words, as you got these pictures ...

paintings were donated, and there is suspicion that they are indeed could be true .. if it is assumed that all the same it is true Petrov-Vodkin, on what amount can we talk?
In any case, require examination, but at least without thinking to understand what it .. because I am very far from the art world, alas.

Thank you all so much for the help, the pictures are removed for evaluation and examination :)

Ксюшка, in the database (art dealers) in the bad works Kn-E. they already got ..

not understand what that means ... In any case, need a professional appraisal.

Ксюшка, looked at the base graphics K.P.-V. of 31 sales in your drawings (creation time, place, technique) is like one-"On the street of Samarkand, 1921, watercolor, pencil, 22x28.
19.12.1996 Sotheby's,
London (GB) 238 2500 - 3000 GBP 2640 GBP
Note-96th.

And yet, "Young man", 1934, paper, pencil, 33,5 x26.
6.9.2007 Sovcom
 35 270 000 - 300 000 RUR 260 000 RUR