That's the typical Cadillac blower. They've been making those since the 20s. Haven't stopped yet. Funny, they're always on ebay for $300+ and of course they never sell. Even the vintage ones aren't desirable to anybody. They're industrial equipment, not antiques.
This one's not even that old. Interesting that the price is actually reasonable, for someone who wants it to use for industrial purposes.
It's still funny, though, how even the newer ones bear a striking resemblance to their vacuum cleaner ancestors.
Also, the people running the company now are not pleasant, to put it politely.