A single dime sized coin. I didn't try to ID until I got home and found it to be a 1970 Australian 5¢ coin. Hadn't seen one before and didn't realize they are dime sized. Numista lists them as copper nickel. Weight 2.83 g Diameter 19.41 mm Thickness 1.3 mm Value 1970 46,058,000 G - 0.70 F - 0.08 VF - 0.20 XF - 1.02 14% Circulation