See: Lot 588A assigned Altman, Lot 589, under the name of Alexander Yakovlev, but with the signature of Samuel Granovsky, and Lot 589A under the name of Samuel Granovsky but the signature of Alexander Altmann. Well, just all чудесатее and чудесатее.
http://www.sothebys.com/app/paddleRe...event_id=28776