Switzerland - 20 Rappen - 1929 - 4,0 gr - Nickel - Size 21,05 mm - Thickness 1,65 mm - Alignment medal (0) - Obverse designer / Karl Schwenzer - Reverse designer / Karl Friedrich Voigt - Mint mark : B = Bern - Edge : Plain - Mintage 2 000 000 - Reference KM# 29 (1901-38)