Peoples Republic of China. Four-piece Winter Olympic Silver 30 Yuan Piefort Set 1980, KM-P15 Speed Skating, PR68 Ultra Cameo NGC: P16 Alpine Skiing, PR67 Cameo NGC; P17 Biathlon, PR67 Ultra Cameo NGC; and P18 Figure Skating, PR67 Ultra Cameo NGC. Krause has listed the mintages as 2,000 pieces each, but this is completely wrong. The actual mintages are 500 pieces each. Included is the original case with COA for each coin.