ND (1920) - F#161.2 - 51 875 ND (1920) - F#161.2a) Obverse: inscriptions is 2.0 mm high ; Reverse: space between 1 - 0 is 2.0 mm, unaltered surface - ND (1920) - F#161.2b) Obverse: inscriptions is 2.5 mm high ; Reverse: space between 1 - 0 is 1.75 mm, surface blacked or browned -