A few more detail pictures for IDing and determining the date:
An Ann Arbor, MI, April 30 1957 registration on the rear fender, and reflector in poor shape.
"D" shaped binder bolt head and separate seatpost collar.
Braze ons for chainguard, fender, kickstand, and "Schwinn" crank arm.
Headset top nut and bearing cup.
Better closeup of headbadge.
Remnants of Tubing decal and LBS sticker?
"Schwinn" cranks with "AS & CO"
Notice the red and white pinstripes on the chainguard. These are also on the frame stays, fork and fender.
What's left of a wrap around decal on the bottom of the down tube?
SA AW shifter, grip, and brake lever.