Malaysia 1979 20th Anniversary of Bank Negara Malaysia RM1 copper nickel & silver coin

Technical Specification:
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