I am reviewing stamps I received in a collection, and don't know a lot about the confederate stamps. I am reviewing a #13 that I found against one I am pretty certain is legitimate. The one on the left I believe is legitimate and the one on the right I am pretty suspicious of. However, what little I can find of the forgeries of this stamp show them to be pretty bad. On this stamp I can find no obvious differences other than paper is a bit more white. I think the scott forgeries were pretty close to accurate, but I didn't see any information on a forgery for this number. Any opinions on this one? Thanks!