Poland
People's Republic gold Proof "Kazimierz Pulaski" 500 Zlotych 1976-MW PR66 Ultra Cameo NGC, Warsaw mint, KM-Y85. Superb contrast with exceptionally frosty devices. AGW 0.8680 oz.
https://coins.ha.com/itm/poland/poland-people-s-republic-gold-proof-kazimierz-pulaski-500-zlotych-1976-mw-pr66-ultra-cameo-ngc-/a/3089-33156.s?type=CoinArchives3089
HID02906262019
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Estimate: 1400-1600 USD