Did you have a question or comment? Seems to be a brass bicentennial medallion based on the 1849 Oregon exchange company $10 gold token. I haven't seen that one but there were tons of varieties of Bicentennial medallions produced by private companies. What is on the other side?
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The piece is made from gilt bronze ("oreide"), and measures approximately 38mm in diameter. It corresponds with Hibler-Kappen listing HK-573A (as designated by NGC).
Don in SoCal