Russian Paper Money | Imperial period | 1915-1917 serie

The ongoing war led not only to inflation, but also to lack of metal money. Therefor, paper banknotes with the value from 1 to 50 kopeks. But printing was not cheap, and soon the banknotes were replaced by postal stamps. The difference between the real postal stamps and the ones used as paper money was in a plainer paper and printing on the obverse side. In 1917 the dual-headed eagle was removed from the obverse.