Well Phil, about 15 years ago I seriously got into used tools. Figured maybe I should expand my knowledge and see just what else was out there. With ratchets, there were so many different brands, styles, an designs I started taking them apart - sometime destructively - to learn about them. I learned alot.
Discovered after many years that my S-K roundhead that I'd had for 30 years really was the best for me. But I'd done all this investigative work. So - with Noel's help and encouragement over at Tool Time - I posted all my photos with as much info that I could about them. And it took off! People really liked the thread, commented how much they'd learned, and asked me about other ratchets. Really took on a life of its own. Now I post the internal pics I've got when someone needs help - like this Williams.
The Williams roundheads are about the nicest fine tooth one I've found, and the old 1930's Herbrand pear heads are the smoothest coarse tooth (28 teeth) design.