HI all. Ive a question about antenna options in 69. My latest car is a 69 RS. It is unrestored, numbers matching and so far appears in original shape. It has the original radio (works!) The antenna is what im not sure of. The best way to describe it is it has a "spring" mounted near the base so that the antenna flexes. It is chrome (pitted). Was this a dealer option, aftermarket or factory??? Thanks for any info.