It's a 1940's era Mathes Cooler wooden box fan. My Dad had one of these (different model) when I was a kid that he used as a workshop fan. I've been looking for one for nostalgia reasons for a long time now. You don't see them very often, and when you do it seems like people want a ridiculous amount for them. You'll see them on Ebay from time to time - but again people are asking close to $100 for the fans and shipping adds another $20, at least.
This one is a small one speed fan. The switch was missing and someone had direct wired a dried out, crumbling lamp cord to the motor. I risked plugging her in at the flea market long enough to see that the motor wasn't dead, gave the girl $20 for her, and happily brought the dirty thing home :)
Once I cleaned the mouse gnawed pecan hulls out of the case, she wasn't hard to get going again at all. I cleaned the dust/dirt off the motor and blades and rewired using a $3 toggle switch and an old cord that I had cut off a dead vacuum cleaner a while back. I lubricated the motor via the two oiling ports at front and back. The case just took a little Formby's and some Danish Oil.
She turned out pretty nice... and she runs very strong and quiet. She's actually a two speed fan - Off and "Holy Crap nail everything down!!"