China
People's Republic silver Proof "Vault Protector - Qing Dynasty" 5 Ounce Medal ND (1987) PR66 Ultra Cameo NGC, KM-Unl., Cheng-pg. 48, 2. Mintage: 999. Fielding lilac peripheral tones transitioning to mild iridescence at the further reaches of the edges, limited by scattered spotting.
https://coins.ha.com/itm/china/china-people-s-republic-silver-proof-vault-protector-qing-dynasty-5-ounce-medal-nd-1987-pr66-ultra-cameo-ngc-/a/3095-36331.s?type=DA-DMC-CoinArchives-WorldCoins-3095-12112021
HID02906262019
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Estimate: 200-300 USD