WW1 Imperial Iron Cross 2nd Class.
Since the Iron Cross was issued over several different periods of German history, it is annotated with the year indicating the era in which it was issued. For example, an Iron Cross from the First World War bears the year "1914", while the same decoration from the Second World War is annotated "1939". The reverse of the 1870, 1914, and 1939 series of Iron Crosses have the year "1813" appearing on the lower arm, symbolizing the first year the award was created.
It was also possible for a holder of the 1914 Iron Cross to be awarded a higher grade of the 1939 Iron Cross. An award of the first or second class was also possible. In such cases a "1939 Clasp" (Spange) would be worn on the original 1914 Iron Cross. (A similar award was made in 1914 but was quite rare, since there were few in service who held the 1870 Iron Cross.)