"METALREX"10.03 TROY OZ METALREX Precious Metals of the 1970's can be most recognized by collectors in their smaller ingot examples of 2.5 to 5oz. +/-, which where cast in the shape of the state of Nevada. These smaller examples may or may not display the MetalRex hallmark stamp, yet easily stand out. Varying ingot sizes to over 100 ounces, MetalRex was headquartered out of Reno Nevada and is considered a "classic" old school ingot to the 999 fine silver or hallmark collector.