I'm the Wiz, and nobody beats me!
1946... early early... H I J K A with 5 digits is 46... probably made in late 45. H was also used in 41 so more then likely this is schwinn using up leftover B.B. shells that had already been stamped with a prewar serial.
Probably had a ton of them ready to go and then pop goes the war... so when war over, start using it again. Waste not want not yada yada
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