I presume this to be a trinket found in baskets in a Florida gift shop? Pirate or Portugal or Spanish Cob imitation made for a necklace or charm bracelet? Made of some alloy like chrome / zinc / tin / white or pot metal? SG is 7.25 obviously not silver. 20 by 25 mm I did just discover after posting that it has a very weak attraction to stacked N-52 magnets. So I guess a tidbit of iron or nickel may be in the mix.