

This particular box appears to be a foot or so across each way and is evidently manufactured by a company known as Porter's. This box sits and churns out gorgeous tones in the all year round Christmas store Bronner's which sits in Frankenmuth Michigan, a Bavarian themed town which is simply a joy to visit. It even has a paddle boat, though the power source for it is diesel rather than Steam sadly.
And sad to say aside from steam trains Bronner's lack steampunk themed ornaments. I'll do a more thorough search next time I go, if not, I may see if they take suggestions.