I was wondering what you thought about this... The lady I got it from said that it was an antique adding machine. But I did a bit of research and I think it's technically a "calculating machine." And it does still work!! The sad part though... It looks like it used to have a plate on the front which probably had names, numbers, or something on it, but it's gone now.
I think it might be called a comptometer. If you google that, the first listing seems to be a pretty informative site. I sold a more modern one a few years ago for a couple of hundred dollars.
