It's hard to make much out from the image but I'm fairly certain that's a camel on the right end. Also guessing it is pewter...
So my first thought was part of a miniature nativity set or ornament. If you Google miniature pewter nativity you will see lots of examples, though none exactly like yours.
I also found a vintage pewter nativity brooch. But I doubt a brooch would have the back decorated like that...