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.Set is comprised of (5) Yuan Piefort silver coins commemorating Chinese inventions and discoveries. All pieces are gradeNGC PROOF-69 ULTRA CAMEO.