Posted By:
Jeff MohlerHi Guys
I think the difference is that the 1921 Powell Exhibit does not have a white border (at least according to the image on VCP). The purported 1923 Powell exhibit card on Ebay does have a white border. The only difference between some of the 1923 Exhbits and 1921 Exhibits are the white borders on the 1923 cards (the Ruth is a good example). In these cases, the scripts do not change. However, on purely 1923 issues, the scripts generally appear thinner than the 1921 cards and larger than the thin script on the 1922 cards.
What makes it really confusing is that some of the 1921 exhibits have white borders (Alexander is the only one that comes to mind) and don't appear in the 1923 set at all.
I don't know if Adam knows the reason behind all this or not, but hopefully he will chime in.