Welcome aboard slacker - but do you really know about a U.S. coin with a 9-sided nonagon shape, or did you mean the 11-sided hendecagon-bordered SBA
Well whattaya know- I learned something today! I had no idea that there was a word for an eleven sided shape... Rachel
The US 1915 Pan Pacific Exposition gold $50 pieces were issued in 2 different shapes - round & possibly a dodecagonally-shaped coin.Both of these are extremely rare. Aidan.