I'd count Tom Waits' Nighthawks at the diner as such an album. Do you disagre on some other ground than it being just almost fifty years old?

Some Steely Dan albums are 50 and over. Say what you want about the music but their albums are sonically incredible.

The Dark Side of the Moon will be 52 years old next month.

Are we talking the original recording or one of the many remasters because to my not 50 year old ears the originals for most old super-famous music sound terrible. Musically great but seemingly limited by the technology of the time.