My father has this pewter bowl, I'm researching for him. I'm gathering its old, just not sure. And the markings, I can't find online. It is the Engel that I'm finding, however this one is holding the upright deer on the left and the scales on the right. I did find one with a deer, different shape to mark, though. This one is oval. Why do they all seem to be stamped 3 times?