2011年两枚精制银币。京剧脸谱系列二。NGC独立评级盒。附证书,编号 49041:1) KM-1986 2) KM-1985CHINA. Silver Proof Set (2 Pieces), 2011. Peking Opera Facial Mask, Series II. Both NGC PROOF-69 Ultra Cameo Certified.Housed in single NGC holder, with certificates of authenticity #49041:1) KM-1986.2) KM-1985.