1992年中国古代科技发明发现(第1组)纪念银币22克全套5枚 NGC PF 69
CHINA. 5 Piece Proof Set, 1992. Inventions & Discoveries Series. NGC PROOF-69 ULTRA CAMEO.Fr-47; KM-410/4. 100 Yuan pieces struck in platinum. With case of issue and certificates of authenticity. From mintages of only 100 pieces each. All piecesNGC PROOF-69 ULTRA CAMEO.