Have a customer who collects unusual items and he is asking me about these. He's an Oldsmobile guy... He's been told that these were NOT a factory option, and only available through as an accessory over the parts counter. Is that correct? He also wants to know what years these were available. He guessed they started sometime in the 70s. I told him judging from the Mopar logo on them that might be correct. Or are those 80s-era logos? Anyone here know anything about these things? Have to admit this photo he sent is the first time I've ever seen any.

Thanks for any help you can provide!