@crazyhawk Thanks! That's some more of the pieces. I'm going to say 1942 with the I serial number. Your bike was made somewhere between my 1941 H numbered bike and
@mickeyc 's J numbered bikes and
@3-speeder 's K numbered bike.
Miq's 1941 - H Serial - Wire Braces - NOT EF BB
crazyhawk's 1942? - I Serial - Wire Braces - NOT EFBB
mickeyc's 1942-44? - J Serials -Wire Braces - EFBB
3-speeder's 1942-44? - K Serials - Bar Braces - EFBB - Q4 of 1942 Morrow Date Codes - Tons of Black Out parts Mixmaster bike
@GTs58 IMHO it looks like the EF BB on the Worlds started between I and J (42-43) assuming Schwinn followed the convention of flipping to the next letter each year. I realize that when production was high they used multiple letters each year, but with production restricted 42-22, they may have only changed 1 letter each year to note the year change.
no proof