Posted By:
Jaime LeidermanNot an expert, but you have to be very careful with these kind of pieces.
Writing is not from period, but don't know about that "PROOF" ink stamp.
Seth's auction has the same Matthews pose picture w/o any advertising, listed as a proof, and looks like the real deal to me.
http://www.19thcenturyonly.org/site/bid/bidplace.asp?itemid=117#pic