Need help on the year.

[Danny Anson]

Serial number under the crank C13574 "Congrats! Your bike is an original Chicago Schwinn.
Unfortunately the serial number you entered was used twice by Schwinn meaning there are two possible dates for your bike...
Serial number stamped on: 05/06 to 05/07 of 1952 or...
Serial number stamped on: 04/12 of 1957." https://bikehistory.org/schwinn.php?serial=C13574

 

[1817cent]

It would be a 52 if its under the crank.

 

[GTs58]

If the serial is under the crank it's a 1945-46, or even 47. Looking at the tapered stand position and not seeing any BB details, I'd guess 1946. Looks like a nice clean original other than the possible S-2's.