Dorrado, Yes "Deutches Reich", the second German Empire ended at the end of WW 1. The period of 1916 -1923 was that known as German Notgeld, Germany was cash poor, so provinces and individual banks/businesses issued "Notgeld" in currency paper or impressed object coins. A very interesting period here. In 1923 the Weimar republic was formed and lasted until Hitler declared the beginning of ther "Third Reich" (Empire) on Krystalnacht" 1933. This gives you an idea how to place some of these coins and paper currencies. Here's one of my favorite Notgeld pieces, made out of Porcelin because metal was scarce

