Watch List notes:

People's Republic of China, a set of 5x piedfort 5 yuan, proof, Ancient Chinese Inventions & Discoveries Series I, 1992, copper casting, seismograph, compass, kite, ship building, the first three coins with certificate number 88, the last two coins number 432 and 105 respectively, original box, coins sealed in plastic bags and capsules, brilliant proof condition, very rare.(5).

Estimate: 20000 - 40000