China
People's Republic 5-Piece Uncertified gold & silver "Inventions and Discoveries" Proof Set 1992,
1) silver 5 Yuan "Kite" - KM406, CC-398A
2) silver 5 Yuan "Seismograph" - KM405, CC-399A
3) silver 5 Yuan "Ship Building" - KM404, CC-400A
4) silver 5 Yuan "Compass" - KM407, CC-397A
5) gold 100 Yuan "Seismograph" - KM416, CC-394
An intriguing set from the sought-after "Inventions and Discoveries" set housed in the original presentation box with COAs and earth plate and spoon.
https://coins.ha.com/itm/china/china-people-s-republic-5-piece-uncertified-gold-and-silver-inventions-and-discoveries-proof-set-1992-to/a/61229-97148.s?type=DA-DMC-CoinArchives-WorldCoins-61229-09262021
HID02906262019
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Estimate: 2000-3000 USD