Hi I am needing help on this Marc Chagall painting. Is it possibly a good piece or not. Has a label on the back.

http://i842.photobucket.com/albums/z...3Sng1IDg_3.jpg

http://i842.photobucket.com/albums/z...N3SnjmtU_3.jpg

http://i842.photobucket.com/albums/z...N3SngzIc_3.jpg

http://i842.photobucket.com/albums/z...N3SnnPgw_3.jpg

http://i842.photobucket.com/albums/z...3Snlds2Q_3.jpg

If it's an original, it could be worth $15,000 or more.