That's right, everything was bolt on before 46. But there are a few models, mostly basic, that had bolt on kickstands afterward. I'm still looking for a 53 Schwinn with a bolt on but only see some late 50's and a 1960 bike right now. I'll do a little more research. If someone cut a built in one from the frame, there should be some evidence of damage where it should have been.
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