1993年中国古代发明系列第二组，「太极阴阳」、「马蹬」、「零的使用」、「汉代兵马俑」及「伞」，第二枚评PCGS PR68DCAM，其馀评PR69DCAM，连原盒及证书，编号0000111, 0000373, 0000462, 0000694及 0000767，各仅发行1200枚. Peoples Republic of China, Chinese Ancient Inventions and Discovery, 2nd series, 1993, 5x gold proof 50 Yuan, Yin Yang, Stirrup, Zero Defined, Terracotta and Umbrella, each weigh 1/2oz containing .999 gold,the second graded PCGS PR68DCAM, the rest PR69DCAM, with original packaging and certificate of issue, certificate numbers 0000111, 0000373, 0000462, 0000694 and 0000767, low planned mintage of 1200 pieces each and an actual minatage of 829, 809, 797, 796 and 795 pieces respectively (5 coins)
