My father's Wolf 1/2" General Duty Drill, made by Wolf Electric Tools Ltd, London England. I still use it when I absolutely, positively have to make a hole in something. I can't find much about this drill, or the Wolf company in general, I suspect it is early 60's. It has incredible torque. It has twisted itself out of my hands a couple of times and bitten me once. I had a 2.5" hole saw in it drilling a hole in a bull bar. It caught and smashed my hand against the bull bar mount. I thought I had broken bones in my hand but luckily only bruised it badly!