1997-98 Metal Universe Precious Metal Gems Emerald #21 Anthony Mason card is the most prominent in the catalog of the popular power forward. A unique factor of this premium series is that only 100 copies of each card were printed, with only the first 10 in Emerald and the remainder in Red. Not only is this BGS EX-MT+ 6.5 gem of the rarer variety, but it is the one-and-only first of the print run, numbered 1/100. Sub-grades come in at: Centering 9.5, Corners 7, Edges 6, Surface 6, making this a prime offering from the 13-year NBA veteran.