1981年出土文物纪念币系列一。青铜器。 精製套币4枚一组。象、龙、犀牛及豹。镜面底板,霜面图文。光泽亮丽。NGC PROOF-69 ULTRA CAMEO (4).CHINA. Four Piece Proof Set, 1990. Bronze Age Discoveries Series 1. NGC PROOF-69 ULTRA CAMEO.KM-42/45. 5 Yuan: Elephant, Dragon, Rhinoceros, and Leopard. All with hard mirror fields and frosted cameo devices. Brilliant and attractive.