London Coins is grading this CGS 80 crown as "choice aFDC". Bit optimistic with the marks in the field? Also, the grading table on the CGS website equates CGS 91 to 94 as aFDC (not that I agree some of the conversions in the table in the first place) The June 2013 Auction catalogue from London Coins themselves has a 'conversion table' at the back, which shows that, in their (or someone's) opinion, CGS 80 equates to Choice UNC, and confirms that, as Sword points out, a coin has to reach CGS 91 to be attributed 'aFDC'. I also find the description "choice aFDC" a bit of an oxymoron, mind you there a many of those around!