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There is no question that the E stamped serials were stamped in 1948 and they started on 8/10/1948.
The pencil kickstands have also been noted to have been used on later models with 1947 stamped serial numbers so you can't date a bike by the kickstand alone, or the crank for that matter.
In 1943 the J serial numbers showed up and these war time bikes had EF bottom bracket shells, a Schwinn first with their evolving production using the electro forging process during war time. The prior H- I series numbers were the last series before the elecro forged shells showed up during war time. All the Schwinn serial numbers that were machine stamped starting in 1937 were stamped before the BB shell was used to build a frame, so there's were it gets confusing.
Late war time (1945) to early post war production used the serials with H-I-J and 46 also started off with the use of A and B serials. C and D serials were on 1947 models with the D series possibly running into early 48 builds. Schwinn had a common practice of starting the new model year builds with components that had the serial numbers stamped on certain days/weeks starting in November and all of December, so a new 1947 model very well could have been built with a November or December 1946 serial stamped BB shell.
Your J serial bike could have been built in late 1945 since Schwinn produced 98,185 bikes in 1945 and supposidly none of those were Cycle Trucks. Do you happen to know what the original crank cast date was on your J serial B6?
Looks like 48 by the SN, but not sure. A friend picked this up yesterday. Appreciate any thoughts on this being an original paint bike also. @SirMike1983 @rennfaron @Eric Amlie @
A 5” wide rear fender would need to be formed back into its original 3” approx width, a 5” wide fender must be flattened out near the reflector? Cool bike nonetheless!
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