I have several with no motor boss - people did all kinds of things to 'upgrade' them to electric. I have seen holes drilled in the side or the back to mount a motor. I think some of them have had spoked wheels for treadles traded out for the non spoked wheels to make it electric when they modified to for electric. I have one some where someone drilled out the little circle hole cover thingy to mount the motor. I have one that the motor mounted on a piece of the 2 X 4 that the machine was setting in. That machine looks normal to me for it's age. Decals look good. For the price - go buy it and enjoy it. I put a steering wheel spinner on it along with a spoked wheel and the kids love it.
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