My father was a dealer in the 50-70's. Select vehicles often had vinyl tops installed to provide ADP. (additional dealer profit). Although unusual to have brown vinyl top on Z/28. Rarely have I heard of a Z/28 to receive an aftermarket vinyl top unless there was a either a defect or a warranty claim. Nevertheless, I also was the proud owner of Z/28. As a college student I ordered a new 1969 Burnished Brown Z/28 with white stripes...best color ever! Interior in my car had black carpets & dash with white seats and door panels. Also it had a dealer installed under dash 8 track player; wood grain dash; front and rear speakers, tinted glass, cross ram in the trunk (never installed and sold with the car); cowl induction hood, spoilers front and rear and it did not have a console. Also, it also had a factory installed 1970 Z/28 steering wheel and the car was built in Norwood, Ohio. Unfortunately I sold the car to pay for grad school and would love to have the car back. I trust that it is a survivor...