Well that is what is I hoped someone would say, otherwise what is the point of a 1-100 scale if only the top grades can be achieved by proof coins, while proof is not a grade?Does anyone have an example of a non-proof CGS 'fdc' coin? Still feels like a bit of an oxymoron ... Edit: our posts crossed Nick, do you have a take as to how an fdc description can apply to a non-proof coin? I would only use FDC in respect of a proof coin myself, and would use 'mint state' or 'as struck' for a top drawer currency example. trouble is there is no hard and fast definition of a proof, in general UK coins dont bear a mark such as "essai" Not all proofs are frosted designs on mirror fields - currency strikes on polished dies, proffs on matt dies - there are threads on here re high quality "proof like" bun pennies