Craftsman wrench

This openend wrench is 8" long. One end is 1 1/4"by 1 1/8. The jaw isn't that deep, it works well in tight spots. I'm not to sure where I got it. It has been in my roll around for 20 some years. I think it might be a tool accessory from a tablesaw or lathe or ? There is a patent number 624.5430-50 but it hasn't helped me find out when it was made or for what. The letter C in the Craftsman logo continues on the bottom across the other letters. Any information that anyone can give would be greatly appreciated.