What is a werth-marke 300 bp coin?

A werth-marke 300 bp coin refers to a specific type of coin from the historical context of German currency, particularly during the hyperinflation period in the early 1920s. The term "bp" stands for "Billionenmark," which were hyperinflationary banknotes issued during that time. The "300" likely indicates a specific denomination or value. These coins and notes serve as a stark reminder of the severe economic challenges faced in Germany during that era.