Oil Drill Rig ? derrick Driller Vtg 1980 Belt Buckle Raintree Heavy Construction

Men's 1980 Raintree brand belt buckle. Heavy machinery construction theme - drill rig - perhaps oil? Mining? Good condition with some wear/tear to the finish as shown. I think it's brass but I'm not positive. Came from a house with heavy smoking, so if you are allergic to cigarette smoke please consider this before purchasing.