JUST WONDERED IF ANY ONE HAS COME ACROSS THIS RIM CUD ON REVERSE OF A 1839 HALF DIME. IT IS ABOVE 'D S " OF UNITED STATES ? WHAT VARIETY ALSO ? THIS IS IN A JUNK GROUP I HAVE...
You can find Robert Neff's address and instructions on that site and mail him your coin for attribution of it if is a cud. He only requires that you send enough postage to return the coin to you. No other charges. He will also photograph the coin, & give you details on a letter with the return.
I see that he only lists the 1850 O, so you might well have a variety not yet reported. All the more important as it may well be your claim to some fame. He will list it on his site and most likely do a write up about it in Numismatic News. ( With your permission and address withheld at your request )
I certainly could be wrong, but I'd be very surprised if this was unknown. The Blythe book used to be available free from DLRC, but it appears all the books once available from them online are no more. Perhaps @Insider has a copy of it or Valentine and can assist you?
It may be listed in one of the Seated Liberty Half Dime attribution guides (Valentine, Blythe), although I don't think these are collected by variety with the same fervor that the dimes and quarters are, so the information may be harder to come by and not updated as well. People active in the LSCC should be able to help.
