That one is way outside of my knowledge base. But it's neat looking. Is it supposed to be upside down?
I have a couple of Kellogg Americans from the '60's. And a United States Compressor. From the '20's? All of them are two cylinder, two stage. With enclosed crankcases. Oh, forgot- I have a pretty good sized single cylinder Devillbiss. Also maybe '20's? That one takes a flat belt on the flywheel.