The listing, Isabella II Large Spanish CUP coin KM 19 1868? Odd & interesting has ended.
Penny is included and for size comparison
Second picture shows the envelope. This has all the information on it. You can also see all my steps I took to attribute this many years ago
Pretty certain it's 1868
Not a photogenic coin
Tried to rotate it so you can see that there are words on it
This was found in an ancient coin lot from Spain over ten years ago
Assumed it was going to be a Byzantine cup coin, though it was out of region. I was wrong
Anyone familiar with Spanish ancients, this has a dark green almost black patina that Spain is famous for
This is nearly 1/3" thick or 6mm due to the cup. No it's not damaged, it was minted this way for stacking apparently