Yesterday I saw a documentary about Konstantin Korovin :
http://rutracker.org/forum/viewtopic.php?t=3031398
and I understand that I do not need expertise .
I have an unsigned sketch attributed to K. Korovine.
Since then , I can imagine the joy and say, yes, it Korovin, but my friends say no , this is done by another artist.
We're all right in our opinion .
We have reason and argument.
Thank you all for the common opinion and help

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more vivid photos of this mysterious sketch

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