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I have seen this shilling at auction and I am struggling to be sure what variety it is. Described as Charles I shilling and weight given as 5.65g. It appears at first glance to be Group F, but then the mintmark of a Crown does not make sense in the books. For the Tower mint the Crown should be Group D. For Aberystwyth mint it lacks the plume in front of the bust. I even checked the milled Charles II shillings, but that also doesn't seem to fit. Or is it just a fake? Please don't ask for better pictures - these are what the auction house has loaded! https://drive.google.com/file/d/1orBt9X3of0XOuY-SxK8cLWV3drCbMlPk/view?usp=sharing

I had an NGC MS65 1920 Florin that was superb and struggle to find a better one.