What years were the sabre wheels offered as a factory option? Were they offered later as a dealer installed accessory? I have heard some Cadillacs were equipped with them as late as 1966.
1955 through 1958. Standard on Eldorados, optional on other cars except series 75 and 86.
1956 ONLY had a gold wheel available. Sabres were discontinued for 1959. Any that you see on later cars are from the '50's time period but there were probably a lot of sets available at the Cadillac parts counter.