Hi Richard, You have been calling your racer a Three-Speed Super for a long time, but that is a mistake ! Super Squirrels have the classic Two-Speeder type crankcase. From photos I see that your machine has a Flyer/TT Rep full crankcase, and from the shape of the fuel tank too, I am pretty confident that you have a long tank version of the Sprint Special !!! The frame number should be on the left-hand side of the headstock in the area where the top downtube is brazed in. If you look in Technicalities you will find articles that I wrote about the Sprint Special, together with a full list of SS frame numbers.
Brian
