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 Inventions & Discoveries Set, 1992. NGC PROOF-69 ULTRA CAMEO.KM-Ps36. Lot of (5) 5 Yuan Piefort Silver Proofs commemorating Chinese inventions and discoveries. Includes certificates of authenticity.NGC PROOF-69 ULTRA CAMEO.