Do you think that this coin has been cleaned?


Only kidding.
After a lot of searching I reckon it's this https://en.numista.com/catalogue/pieces16762.html
Anyone (dis)agree?
Also, the main reason for this post, what would be your advice on cleaning this? I know there's not a lot of detail left on the coin, and all the crud on it seems to be solid. So would sonic cleaning help? Would I lose any detail from it?
After all, the only reason I can read the writing on it is because of the black on it, so I'm worried that if I remove it, what I'll be left with is a blank silver disk. Any advice?