To answer your first question, yes, the FS and Tornado were the last to use the straight bar tank. I have a feeling that they had a bunch left over, and put them on these to use them up! They were out of date by then. There was also a Deluxe Hornet that use the painted Phantom style tank. The ad you've posted is what yours would have looked like originally, with ivory painted rims. There is a lot of confusion and misinformation about the two variations of the twin bar frame. Some insist that the later one with the twin bars running all the way down to the rear axle, was exclusive to the 1 year only 62 Typhoon. The black Tornado is proof otherwise! I've seen Skippers with it too. Schwinn had likely used up the old tanks by later 61, and redesigned the frame. I have a 61 Skipper and Tornado, they both have the older style frame. -Adam