Just wanted to update everyone.
After learning enough to determine if I feel comfortable with a coins authenticity I have decided to return this coin to the seller and they have agreed. (Another one of my mis-guided
ebay purchases - I have learned my lesson).
The fileds, the edge and roughness around the date and some of the letters made me feel uncomfortable. I am not an expert and it may have been authentic however, I would rather be assured that my purchase is from a known reputable dealer.
Also, I had purchased another 8 Reale from this same seller that to me was very suscipicious and anyone on this forum would have returned that coin as well. So I returned both coins.
I have purchased an authentic Carolus IIII 1806 MoFM 8 Reale from a reputable dealer.