CHINA. Inventions & Discoveries Series Silver Piefort Proof Set (5

CHINA. Inventions & Discoveries Series Silver Piefort Proof Set (5 Pieces), 1992. All NGC Certified.
1) 10 Yuan. Ancient Ship Building. NGC PROOF-69 Ultra Cameo. KM-P21 (cf.KM-404).2) 10 Yuan. First Compass. NGC PROOF-69 Ultra Cameo. KM-P22 (cf.KM-407).3) 10 Yuan. First Seismograph. NGC PROOF-69 Ultra Cameo. KM-P23 (cf.KM-405).4) 10 Yuan. Ancient Kite Flying. NGC PROOF-69 Ultra Cameo. KM-P24 (cf.KM-406).5) 10 Yuan. Bronze Metal Working. NGC PROOF-69 Ultra Cameo. KM-P25 (cf.KM-408).Set Mintage: 2,500. An elusive and desirable set with this one being among the best assembled, with each example being virtually white with surfaces that border on flawless. A real prize for the modern collector, this set is also being sold with the original COAs.

Estimate: $3000 - $5000