Bank Of England Countermark On 1798 8 Reales?

Hello,

While looking online I came across this Bank of England Countermarked 8 Reales, dated 1798. I assume that it is not an authorized mark. From reading online "The Bank of Englan Countermakred Dollars, 1797-1804" by H.E. Manville the mint and the bank did not stamp and authorize any coins after 1797 until 1804.

The article shows a countermarked 1798 dollar with the following quote:

"Here is a direct reference to false duty-punches and there is little reason to assume that the provincial offices had been any more security-conscious during the Bank's countermarking era. It does not take a great leap of imagination to picture assay offices of an earlier age punching up almost any type of coin or token. That the purpose of applying most genuine-type marks outside of the Mint was deliberately to create varieties is strongly suggested by the lack of coins or tokens stamped with the six smaller versions of the oval duty-marks."

So, I am asking everyone, is that what this coin is? countermarked at a "provincial office" or is it a countermark that is fake, but applied in 1798? Or is it added in modern times on top of a chop marked coin to increase the rarity?

https://www.pcgs.com/cert/48005069