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Old 09-21-2014, 04:27 AM
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yanks12025 yanks12025 is offline
Brock
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Join Date: Apr 2009
Location: framingham, ma
Posts: 2,144
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Pretty sure the curved back didn't come around till the 1940s. And the plastic ones were after 1973, with the padding ones probably being later.

I own one flat back which was in the stadium from 1923-73.
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