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What year is this post war DX?

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petritl

I live for the CABE
The bike has painted drop center wheel and a skip tooth sprockets which makes me think early post war but the online serial number charts doesn't show the B serial number prefix
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Post war Schwinns had forward facing rear dropouts, built in kickstands on some models, independent seat post clamps and chainguard mounting tabs. That's just a few of the most obvious changes. I'm still trying to find out the first year the bottom bracket tube was electro-forged.
 
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46 47....
52 would be stamped in different location. ..

Do you know what year Schwinn started electro forging the bottom bracket shell? As you can see in the pic above this bike's shell was EF. So as early as 46-47, how about prewar?
 
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Location of serial number makes it '51 or earlier. Looks like a fatbar to me, which would make it a '46. If the center curved tube is the same diameter as the top tube, then it's a '46.
-Geoff
 
Location of serial number makes it '51 or earlier. Looks like a fatbar to me, which would make it a '46. If the center curved tube is the same diameter as the top tube, then it's a '46.
-Geoff
I have had fat bar frames that are 47 48 49 and 50.... but thanks Geoff I didn't know dx frames also had the fat bar feature...
 
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