Peru 8 Reales 1766LM JM double dot. Confirmation of existence for "Reported but not confirmed" Value?

I seem to have a coin of unusual variety. It is listed a "reported but not confirmed." Can someone tell me more about it. Any guidance on value? It is graded NGC XF40 under Mozambique counterstamp. Thank you.


https://en.numista.com/catalogue/pieces34226.html
http://www.rhinocoins.com/spain/car3t.html