I was talking story with Bruce about this bike, and as near as he could tell, the serial numbers alphabet prefix is the letter G.
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The G serial number sequence, and the Chicago Cycle Supply, Liberty badge somewhat explains the early style spring fork and not having the fork bumper.
Bruce got the bike from Drew Rollins, who had Nostalgic Dave Stromberger do the restoration.
Drew got the bike from the original owners family.
It was still in as found condition, and a complete bike.
It was given as a graduation present in 1941.
Any questions about this bikes provenance can probably be best answered by
@Dave Stromberger