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Sold SOLD 36 Schwinn original paint SOLD

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yikes! what's under that reflective license tag!
imagesBZ18F8Z9.jpg
 
They omitted the seat tube diamond on bikes destined to be a Goodrich bike, so that they could be easily identified on the assembly line.
Maybe the diamond stamp was a similar identifying mark for bikes destined to be sold through Goodrich stores?
 
your guess is as good as mine-I would love to hear others chime in. perhaps I will get ahold of the 'all-knowing-one' and try to get him to give me an answer...…..
 
Ok,
Next theory?
What the heck is with the diamond stamp?

I've seen that diamond stamping multiple times, even on the middleweights and stamped just above and left of the serial number. Last week I saw a BB stamping that had a diamond on both sides of the serial number. They all have been stamped after paint. My thoughts were it's an indication of some type of birth defect.
 
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