A little late to the show, but here is one I picked up a few months ago. I think you can make out the 6 1/4 x 4 3/8 die impression. In case you can't make out the pencil notes, there is "Monticello" and "J.C.Benzing" on both front and back. [Benzing was the engraver.] Also on the back, upper right, is "Year Engraver finished original die Jan. 20 1928." Not sure where the Jan 20 came from, but all the other info is available on the BEP website.