China
People's Republic silver Proof "Vault Protector" 1 Ounce Medal ND (1990), Cheng-pg. 93, 2. Mintage: 10,000. Sold encapsulated, with case of issue and COA #4584.
https://coins.ha.com/itm/china/china-people-s-republic-silver-proof-vault-protector-1-ounce-medal-nd-1990-/a/61165-97222.s?type=CoinArchives61165
HID02906262019
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Estimate: 100-150 USD