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I checked w/ Lloyd the OP first and his car's new owner did find a Central Chevrolet Atlanta Emblem so being relatively rare, thought it best post the links to some currently on eBay if anyone else here happens to need one.
The first is obviously from Central Atlanta but second may be from another Central operation?
~ Pete
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Central Chev Emblems on eBoy...
https://www.ebay.com/itm/Central-Atl...MAAOSwsxxgSFHN
https://www.ebay.com/itm/Emblem-Meta...sAAOSwyi5gEFuR
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