What Would You Do with a Sealed, 1st Press Miles Davis "Kind of Blue"?

Yeah, LP outer covers were sealed in plastic shrink wrap in the U.S. at the time, but not necessarily in the UK and the rest of the world. As I said, Columbia Records at that time was also sealing the LP itself inside an inner sleeve that was a plastic bag. I remember sliding my mom's Johnny Cash album back into that plastic bag of an inner sleeve, and having a hell of a time getting the sleeve to stay in place on the LP as I slid both back into the outer cover.

When I joined the Columbia Record Club in 1962 or 3, my first month's selection (Johnny Horton's Greatest Hits) had a standard paper inner sleeve. So I guess by then Columbia had stopped using the plastic inner sleeve.

Columbia Records in the early-60’s had an inner sleeve of very soft, very thin, limp plastic. It was a bag rounded on one side (following the curve of the LP), and perforated on the opposite. One had to rip open the bag liner along the perforation to unseal the LP.

I know this because my mother’s Ring Of Fire: The Best Of Johnny Cash LP was exactly so. I assume the outer cover was also shrink wrap sealed when it left the factory, so the OP’s LP is in one sense still sealed, the other way opened.