Hong Kong - 50 Cents - 1977 - British colony 1842-1997 - Weight 4,9 gr - Nickel-brass - Size 22,5 mm - Thickness 1,7 mm - Alignment Medal (0°) - Ruler Elizabeth II of the United Kingdom - Engraver Obverse Arnold Machin - Minted in Royal Mint. London - Edge : Reeded - Mintage 60 001 000 - Reference KM# 41 (1977-1980)