I was gonna post this to the Classic Power Tools, but I couldn't open that section, so here it is.
I went back into the junk store to see if my wife and step son were finished shopping. They weren't. So I started browsing some more. In the back of the store, on a bottom shelf, I saw a tool box. It looked interesting, so I bent to pick it up. Very heavy. Had to open it. Inside, I found an old Black and Decker #75 Quick Saw. Ebay has two ads for sale of this saw, one from '44, and the other from '46. Then, it cost $104. I paid a good deal less, and it runs! It also weighs 25 pounds. The case doesn't weigh a lot less. I find the reinforced catches very cool.