A few years ago , my brother-n-law bought a Schwinn World Tour for me for cheap at a yard sale. Since then I have ridden it every day and I love it. It was all original right down to the s pattern tread but the 3 speed internal hub was gravel so, since my bike shop couldn't restore the hub or locate a restored one I had them use as much of the original wheel and make it a one speed.
It says Chicago on the headset so I know it is from before 1984.
Also on the headset is the number "60639"
and on the drop out is another number "g048"
I turned down $500.00 for it last summer because it is tough like a hybrid but almost as quick as a pencil tire street bike and it looks good.