Poland
People's Republic gold Proof "Tadeusz Kosciuszko" 500 Zlotych 1976-MW PR69 Ultra Cameo NGC, Warsaw mint, KM-Y83. Deep watery fields with heavily frosted devices. AGW 0.8680 oz.
https://coins.ha.com/itm/poland/poland-people-s-republic-gold-proof-tadeusz-kosciuszko-500-zlotych-1976-mw-pr69-ultra-cameo-ngc-/a/3098-34275.s?type=DA-DMC-CoinArchives-WorldCoins-3098-01182022
HID02906262019
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Estimate: 1600-2400 USD