The 1921 E121 cards are found with a variety of different back advertisements some more difficult to obtain than others. The most difficult however are the cards advertising the Herpolsheimer's Boys Fashion Shop. The reason for this is that just 69 or 70 cards from the issue are known to exist no more than one example of each subject. The cards were all discovered together in late 2004 auctioned individually on eBay and had been previously unknown to the hobby. Such a discovery is an earth-shattering piece of news for sure and the demand for the cards was strong among advanced collectors. Each of the cards auctioned were in EX to EX-MT condition with one exception: each and every card had a dollar figure notated in pencil on the reverse. The purpose of these notations is unknown: perhaps they were dollar figures used by the Herpolsheimer's clothing store in Grand Rapids Michigan as some sort of coupon redemption. Perhaps they were the price the cards were sold for to the original eBay seller in some flea market or garage sale. There is unfortunately no way to know. What we do know is that there is only one example of each subject in the E121 Herpolsheimer's set meaning each card is one of a kind. Such is the case with this example featuring Al Mameaux of Brooklyn. The card has been graded VG 3 by SGC the dollar figure having been erased from the reverse. Still a one-of-a-kind card is a rare occurrence and this is no exception. The most rare card in this auction.