Malaysia 1979 20th Anniversary of Bank Negara Malaysia RM1 copper-nickel & silver coin
https://youtu.be/KeBMwEChPvU Year Issue : 1979 Mintage : 8000(proof) 300,000( copper nickel) Weight : 16.85g Diameter : 33.3mm Thickness: 2.2mm ASW:0.5011oz Minted by Birmingham Mint
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