First Banking Corporation gold Ounce (500 Dirhams) ND (1954) MS63PL NGC, Swiss Bank Hoard. A private issue produced by the First Banking Corporation in Tangier and refined by N. Rotschild & Sons, which is often considered the world’s first one ounce bullion coin. Obverse: Naked, standing figure of Hercules, holding a robe over his left arm, and leaning on a club. The legend (inscription) reads. FIRST BANKING CORPORATION TANGIER. Reverse:The words REFINED BY above a circular Rothschild stamp. ROTHSCHILD & SONS, with. (for Royal Mint Refinery) in its inner circle. The legend around the outside reads. ONE FINE OUNCE TROY (GRMS 31.103) OF GOLD ASSAY 916.7. Please refer to the pictures.