I'm afraid I agree with Ted. There's no reason to trash this type of engraving; it's American primitive. Sort of like a Grandma Moses on your shotgun. The engraving is cartoon-like and very awkward-looking. I have several Gorosabel (Spanish) shotguns with engraving of similar characteristic.

Now, there's noting wrong with such a style but to my eye it is awkward and not true to nature. For example, look at the hind legs of the dog on the first image posted a few posts above. Those are pretty anthropomorphic legs!

Personally I don't think cartoon characters have a place on a gun unless one wants a rendition of Popeye or The Shadow.

But nonetheless they represent the style of an era and are certainly valid expressions.