I received this Chinese (?) coin as a freebie along with another coin I had purchased. However, I can't seem to find this example anywhere online or in my 19th and 20th century Krause catalog of world coins (it may be an earlier example). It's approximately 18mm in diameter and given other similar examples, I believe that this is a Cash coin. This coin is also very thin and not in the best shape, as you can see. On one side, there appears to be an image of a spear or arrowhead which is what I used as the identifier when browsing through the catalogs. I didn't see any of them with it, though it's possible that some images weren't shown, or I somehow missed that very prominent image of a spear or arrowhead. Thanks in advance!
Thanks - that looks like it's it! It appears to be from 9-23 AD, or nearly 2000 years old! And I thought it was only a couple hundred or so years old.