1: 1. The 1913 Liberty Head Nickel sparked controversies with only five known to exist, making it highly sought after.

2: 2. The 1933 Double Eagle became infamous when the US government seized and destroyed most, leaving only a few legally owned.

3: 3. The 1715 Spanish Fleet coins, recovered from a shipwreck, led to a legal battle between Spain and Florida treasure hunters.

4: 4. The 1794 Flowing Hair Dollar caused disputes due to its rarity and value, making it one of the most expensive coins today.

5: 5. The 1943 Copper Penny created disputes as it was accidentally minted with the wrong material during World War II.

6: 6. The 1907 Saint-Gaudens Double Eagle faced an international conflict when some were smuggled out of the US, leading to lawsuits.

7: 7. The 1936 Canadian Dot Cent created disputes when a small dot was accidentally placed below the date on some coins.

8: 8. The 1909 VDB Lincoln Cent faced controversies due to initial resistance towards displaying Victor David Brenner's initials on the coin.

9: 9. The 2000 Sacagawea Dollar with a prototype eagle on the reverse caused conflicts as it was not intended for circulation.