This is one of four I will be posting for information (and potential value, if any). Whatever help you can offer, I'll be grateful for. Thanks! Copper alloy, 26 to 28 mm diameter, 3.5 mm thick, 13.7 grams
Roman sestertius of Maximinus Thrax, struck 236-238 AD in Rome. RIC 90 http://www.wildwinds.com/coins/sear5/s8341.html#RIC_0090