I was not aware that the E70x15 wide tread was an option on any GM car in 1969. It was standard on the Z/28, COPO 9737 and the JL8 non Z/28 cars, but I have not seen it listed as a stand a lone option before.
I am glad that you posted the original sticker.
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69 camaro X11, 56,000 miles, original HO paint
67 camaro SS/RS, Butternut yellow, bench, fold down
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