I found this one at an auction. Could not say no. I had to bring it home and see if it works.  It runs fine. I don't have tools for it, so I can't bust concrete yet.

Anyone know how old it is?

http://s1202.photobucket.com/albums/bb373/johnsironsanctuary/Thornado/

I bet you don't need bits to bust concrete just drop it. Very nice.

Great tool.  But of course, I like Thor stuff.

This is what you got in 1942.....

(PS: Sorry about the cropped right edge, in book binder)

$110 in 1942? WOW! That was more than a week's pay for lots of folks!

Yea, electric power tools were not cheap in the early 40's,
A 'cheapo'  economy 1/4 electric drill was $20, a good amount of money back then.
But the Electric hammer had the possability of paying for itself, think how long it would take 2 or three guys with star drills and sledgehammers to drill a few holes in a concrete slab, and how long it would take one guy with an electric hammer to do it. Thor also didn't have much competition in this area, the only other hammers listed are Black & Decker's, one cheaper, the other three are even more expensive. Their top if the line model is $195, tho it seems a bit heavier than the Thornado, and you also get a can of oil with it...

I suspect mostly companies and the railroads were buying these things, (the RR's were using them to notch railroad ties)

Thanks Rusty.
That sure looks like it.

I didn't know that railroads used electric power tools on rail gang crews back then. I see by the label that it will run on DC and it is not real fussy about 60 cycle AC. I suppose if they had a gasoline powered welder, they had DC.