I just purchased a 1928 Fro-Joy Premium Ruth from ebay. Link to the auction is here:
Link
After studying this thread thoroughly (
Link), I believe the card is authentic. However, I just wanted to post a couple more scans of it, just to confirm. The scan is slightly trimmed because the premium is bigger than my scanner. The back is clean, but I can also provide a scan of that if needed. (The seller overnighted the card, so I actually received it today.) Any opinions would be appreciated. Thanks again!