1993年50元。古代科技发明发现系列。福禄寿。发行量仅1,000枚,光泽亮丽,镜面底板,霜化图文。KM-507. Gods Fu, Lu and Shu from the Yin & Yang Philosophy Series II. From an authorized mintage of just 1,000 pieces. Brilliant with hard mirror fields and frosted cameo devices.NGC PROOF-67 ULTRA CAMEO.