What is the only U.S. coin that does not mention anything?
Can you tell me about the unique U.S. coin that stands out from the rest in terms of its lack of any mention or inscription? I'm curious to know which coin this is and why it doesn't bear any words, phrases, or symbols like the others. Is there a specific reason behind this design choice, or is it simply a matter of historical tradition? I'd appreciate it if you could elaborate on this fascinating aspect of American numismatics.