Oman
Qabus bin Sa'id gold Proof 1/4 Omani Rial AH 1397 (1976) PR66 Ultra Cameo NGC, KM57. Commemorating the Fort al Hazm in Al Hazm, Oman. From a mintage of only 1,000 pieces.
https://coins.ha.com/itm/oman/oman-qabus-bin-sa-id-gold-proof-1-4-omani-rial-ah-1397-1976-pr66-ultra-cameo-ngc-/a/3085-31895.s?type=CoinArchives3085
HID02906262019
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Estimate: 600-800 USD