Something else I often question relates to Arthur's question about his C2 HC, where he feels the grades are significantly different on the obverse and reverse. There is very often only one single grade proffered by dealers, sellers, TPGs, auction houses etc ... ff only a single grade is to be assigned, should it be the lower of the two sides, some kind of average, or something else? I have heard that the obverse grade is given a higher weighting when 'averaging out' the 2 sides, but I don't know if that is common practice?