When I bought my Dynamic 88 a few months back my friend gave me a small folder type document wallet. Only the other day I opened it and found these magazines, any ideas? Was it a type of club years ago?

 

The Oldsmobile Rocket Circle was a magazine that Oldsmobile published for it's customers,
Dealers reported names and addresses of car sales to Olds, and Olds sent this complimentary magazine.
This was done in the fifties and sixties as far as I know,
If you look at the back of the magazine, there should be the address of the original recipient of it.