Authenticating Russian Art, especially the Avant Garde (1905-1932), is an area fraught with difficulties.
It is no exaggeration to say that the majority of paintings offered to me are not by the artists claimed – this is a figure as high as 90-95%.
I have written and lectured copiously on the topic. Some of my lectures and comments can be found in the “News” section of this site. I represent the market and always base any assessment on the premise whether the work will be accepted for purchase or re-sale by:
Expertise, chemical analysis and other documents, which frequently come attached to such paintings are, more often than not, irrelevant to my assessment.