Posted By:
AnonymousRhys, I wasn't certain what it was just looking at the image. With the shiny scotch tape, one couldn't be sure it wasn't a pane of clear glass taped over a tintype. Just so everyone knows, the seller was specifically asked to look and said the image is on the glass, so it is indeed an ambrotype.
For lurkers who don't follow photos, baseball ambrotypes are very rare. There are more known T206 w/Ty Cobb Tobacco backs than there are known baseball ambrotypes.