Even the Snap On collectors site has nothing on this unusual wrench. They show handles with interchangeable box ends, but no solid wrenches with that logo on them. This thing is about 18" long, round shaft/shank, both ends appear to be 1 1/2 12 points, and one end is offset a good 2". Model is S-9869. Will get a photo up late tonight when I get back from the flea market sale here. TIA
DM&FS