20.00 Years circulated 1871 – 1915 Appearance Mass 7.965 g [1] Diameter 22.5 mm [1] Composition gold [1] Obverse Click to William I (1871-1888) [2] Frederick III (1888) [2] William II (1888-1915) [2] Reverse Reichsadler , state title, value, year [1] The 20 mark coin was first issued by the Kingdom of