Technical Help identify 6cyl manifolds w Carter WA-1 carb

This (and more stuff) was saved from going into the scrap metal. Anyone who recognizes it and knows if it's worth anything? I'm guessing it's from an american car, but being in Sweden there are other possibilities - but I wouldn't expect to see a Carter carb then.
I would tell you how it looks, but I can't really say anything you can't see for yourself in the pics. Feel free to ask though, I'll help you if I can.

 

There a tag on the carb? Numbers on it anywhere? I don't recognize the pattern but that doesn't mean much.

 

Yes, there is a brass(?) tag on it, I missed to add that pic in the original post. Sorry about that.

 

It's been a year, so I try again. Anyone who recognizes this?