A really bad added mintmark for sale on eBay: https://www.ebay.com/itm/1896-S-90-...299853?hash=item56c3b051cd:g:IDEAAOSwX0NZvU3o
The mintmark isn't even in the correct position. The two known dies are both centered below the tail.
Are you sure about that? Every one I've seen, and the ones I checked on Heritage, show the mint mark to the right of the tail, and between the R and D. Having said that, the coin pictured here is all wrong in every way.
Look harder at the placement fun the mint Mark. It’s not between the R and D, but above the D. http://www.barbercoins.org/BQ1896S.shtml
Yes, between the R and D for sure. I just haven't seen one where the mint mark was centered below the tail. All I've ever seen are to the right side of the tail, as we look at it.