I am selling my mint condition, stock Z wheel covers on e-Bay. These were factory standard equipment on '72 through '76 Z-Cars.
I purchased this set from a Nissan dealer in June of 1993 for use on my stock, restored 240Z at car shows. The car was not driven with the covers on, but the covers were installed at the show site and removed before leaving. They are in flawless MINT condition and come with the original Nissan plastic bags and protective covers.
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As Mr. K would say, "Enjoy the ride."