Copper Ounce (1 oz), Coin Type from United States - detailed information

In the United States, a significant number of private mints produce bullion which is not legal tender and is targeted at investors and not at coin collectors. Most of these are in precious metals, but there is also a significant market in copper "rounds" (so called because they are not coins, not being legal tender). Typically, their weight is one Avoirdupois Ounce (1 AVDP), or 28.35 grams.