I got Led Zeppelin IV cassette one year for Christmas, probably mid to late 70's. The cassette was bright pink in a black plastic case with the small but still cool album art on the plastic box.
I played that cassette over and over on a mono Panasonic cassette player.
It's probably my favorite by a slight margin over Physical Graffiti. I will confess that the famous Stairway to Heaven, while I appreciate it, I skip over that song.
