China
Volksrepublik 5 Yuan Piedfort 1992 Inventions and Discoveries - 1st Edition, 5 Yuan Piedfort issues complete, 5 pieces, all NGC certified PF 68 ULTRA CAMEO, 1) Bronze Age Metal Working KM-P25, 2) Ancient Compass KM-P22, 3) Shipbuilding KM-P21, 4) Butterfly Kites KM-P24, 5) First Seismograph KM-P23, including CoAs for each coin, a wonderful historical reappraisal of China's cultural heritage PF 68 ULTRA CAMEO