Hi, have a look at this coin. It is german occupation money from WW1 and coined for the occupied territories in East Europe, especially for the Baltic states and Russia. The material is steel, the diameter 21,5 mm and the weight 2,9 g. They were coined 1916 in Berlin and Hamburg for the so called "Ostbank für Handel und Gewerbe" based in Kovno (in our days: Lithuania). Edited
