My gallery is acting up, but it can be seen where "D's " are used to create the S mintmark. I have better pictures if needed,Thanks in advance for all replies.
I’ve never heard of that. There are OMMs (D/S or S/D as examples, but there are others). The mint marks were hand punched into the working dies until 1989. From 1990-1994 they were placed on the master die. After 1994 the mint mark was included on the master design. You can see the various mint mark styles for different denominations as well as OMM listings here: http://varietyvista.com/index.htm
Thanks to everyone,l re did pictures after uploading each image l clearly see and understand Thanks again