Answer:
Depends on the wear. But ~ $5 to $20 USD
Explanation:
The value of a 1914 German 50 Mark banknote can vary widely depending on its condition, rarity, and demand among collectors. In September 2021, a 1914 50 Mark German banknote in average to good circulated condition might be worth between $5 to $20 USD. However, if the banknote is in excellent condition with minimal wear and is considered rare due to specific features or historical significance, its value could be significantly higher.