I have what appears to be an early Los Castillo parrot pin, but the markings don't quite match up to the ones listed
here: the "Los Castillos" name is in a single straight line instead of a circle, and there's no mention of Taxco. I believe the number on the eagle is "15", but there doesn't seem to be any other indication of metal purity/identity.
Other than dating this piece before 1979, are there any other conclusions I should be able to draw from these marks? Thanks!

