Think you have a lot of mix-parts 0n what appears to be at least 1951 on bottom bracket where by 52 it moved serial number to the rear dropout. . Chain ring not Schwinn it's CWC, rims, goose neck or stem and brake made later. This would be by frame paint ID considered a DX and those fenders ya got aint on DX's. It would have S2 size rims and yours appear to be S7, ( double check near stamped in rim'' the inner tube stem,, which, S2 Balloon or S7; middleweight) IDK can't be sure. However S7 middle weight would, have both the fenders and rims by 1954- forward. That could include you stem and late 50's and up> seat. I.E. your bike and parts are bouncing around all over the place.. Chain guard is in the lowest group that a DX may be but also could be parts of newer pieces too in lowest selection. The rear carrier was also issued in mid 50's but maybe earlier. Regardless, it'll take a bunch returning every thing to pre 52 frame status B/C it seems somebody swapped newer parts onto your pre middle weight ballooner frame. and no name on chain guard put in another disadvantage I.D.-ing it. .
She's 74 years old and the serial dates her to 1946. Have fun! 
