
Hello everyone,
I have this 1977 US "Washington Quarter" KM# 164a, and I can´t see the mintmark. It looks like a filled "D", but I'm not sure.
I have two questions:
1) Is it, in fact, a filled "D"?
2) How can I add this coin to my collection in Numista? (given that there is no option like "Mintmark not legible", or similar).
Thanks in advance,
Facundo.