Thank You All for your help, link and information.
The catalog page is great. (Now I'll keep an eye out for the boy's top bar.)

I did not find any date on the rear hub, but it is still covered with grime. I want to proceed slowly softening & removing the stuff to prevent scratching.

The crank, however, had a number on it. The number is SA 368.
I tried to use a normal Schwinn serial number date list to decode it, but in 1968, the alpha characters ended with MA.

Now my guess is that components are dated differently than the bicycles.
If that is the case, maybe the "3" is for March and the 68 for 1968?

Some photos of the crank & code are attached.

Thanks Again!
Paul