Tips for Judging the Authenticity of 1920s Exhibits?

[smtjoy]

On old 1920-30's exhibits, there are no mainstream reprints you would see all the time. Most of what you will see are homemade ones where the front looks close but generally you can tell the contrast is not right as well as the back color does not look right (also its usually only Ruth, Gehrig rookie, Cobb that you will see). The other thing you will find are some that have good laser prints on the front and have been rebacked, on the hard to tell if fake ones they used real exhibits cards as the backs so those are tough to tell.

My advise is post a picture here, and let the experts judge. I do know a raw Ruth that looks very questionable is on ebay right now that did not pass grading, the back looks like a newer 47-66 exhibit to me.