What are some examples of World Coins from the 20th century?

Could you provide me with a few illustrative examples of World Coins that originated from the 20th century? I'm particularly interested in knowing about any notable or unique coins that represent the historical and cultural contexts of their respective nations during that period. Are there any specific themes, designs, or minting technologies that stand out among these coins? I'm eager to learn more about their significance and the stories they tell about the world in the last century.