Monaco - 20 Centimes - 1978 - Weight 4,0 gr - Aluminium-bronze - Size 23,5 mm - Thickness 1,4 mm - Alignment Coin (180°) - Ruler Rainier III (Rainier Louis Henri Maxence Bertrand 1949-2005) - Engraver Georges Simon - Privy Mark Dolphin (Emile Rousseau 1973-1994) - Mint mark Pessac France - Edge Smooth - Mintage 249 000 - Reference KM# 143 (1962-1995)