I couldn't just leave it there out in the rain, so it came home with me. I told my wife "I bought a bike".
"Oh, you needed that."
Well, as it happens, my sister was born in '55 so that's how I justified it. From what I have read this is a descendent of those New World/World line of Schwinn lightweight bikes. Made in Chicago and fillet brazed I think. The SA hub is stamped 55 8. This will be a fun project for the winter.