I suspect you referring to the 1874 halfrown from the seller „goldguinea“, ex PCGS MS64, now CGS AU78, UIN 25124 (as I cannot see any YH Victoria halfcrown on AJW coins website or Ebay listing). IMO, based on my experience with CGS grading, this coin was marked down because of two spots in hair and some minor contact marks on the cheek and on the field in front of the bust (lustre cannot be assessed correctly prom the picture). I am fortunate to have this coin in CGS UNC 80 and for those interested I have attached a picture to show the quality needed to achieve basic UNC80 grade. Correct Mike I have been surfing,taking on reasoned arguments for and against. Bill took the decision to slab over 2,000 coins. With me my cabinet/trays/aluminium cases/flips in Albums/Lindner trays,2x2 coin boxes containing flips would not be a reality or affordable.It would have to be all or nothing.My few slabs are in a separate container with a coin ticket in the available space in the cabinet.Most of my slabs were bought via Colincooke who seem to ignore a premium for slabbed coins.eg PCGS MS65 bn 1891 1/4d £10 when other 1891 1/4d's especially BU were considerably more.The jury is out on the slabbed coins in my collection.