Sorry, I did not see this request for info before. This I believe is a Henry VI Groat, Rosette issue so dating 1430 to 1431, minted in London. Ref is Spink 1858. Not particularly rare - Henry VI groats are not scarce surprisingly. My book (2018 issue) gives £60 in Fine and £200 in VF - I would put this better than Fine with a very nice portrait.
Not one of my rarest British coins, but definitely one of my prettiest. This lovely toner, sometimes categorized as a pattern, is a very proof-like 1848 "Godless" florin, ESC 801, which is the milled-edge variety. This type, without the usual "Dei Gratia" in the obverse legend, was issued again in 1849. After that, from 1851-1887, God was reinstated and all the legends appeared in the same lettering as the beloved Gothic Crown of 1847 and 1853. (Yes, some doubling can be seen on the obverse...not a plus, to my mind, and the only reason I could afford this coin some 35-40 years ago.)
"I ain't good-looking, but I'm willing to try." --- Dave "Snaker" Ray: 'It's All Right,' 1963