Malaysia 1989 CHOGM 5 ringgit proof coin

TECHNICAL SPECIFICATION:
Metal Composition: Copper Plated Zinc-Copper (84%), Zinc (12%) and Tin (4%)
Weight: 10.40 grams
Diameter: 26.00 mm
Mintage: proof-8,000 pieces; non-proof-150,000 pieces.
Mint: Kilang Wang Bank Negara Malaysia
Face value: RM5