China
People's Republic 8-Piece Certified Proof Set 1981 NGC, Shanghai mint, KM-PS7. Comprised of the Fen through Yuan and a "Year of the Rooster" medal, showing mostly untoned specimens.
https://coins.ha.com/itm/china/china-people-s-republic-8-piece-certified-proof-set-1981-ngc-total-8-coins-/a/3100-35282.s?type=DA-DMC-CoinArchives-WorldCoins-3100-07072022
HID02906262019
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Estimate: 800-1200 USD