1918 - F#471.1 - 51 380 1918 - F#471.1a) Obverse: foot of first 1 in date is horizontal; REV: denomination is 2.0 mm high - 1918 - F#471.1b) like a) with the first 1 in date being oblique downward - 1918 - F#471.1c) Reverse: in denomination, 1 is 2.5 mm high, 0 is 3.0 mm high -