When I think of the music that turns 50 this year, first is Musical Box / Genesis and Stairway to Heaven / Led Zeppelin.
Both groups that later influenced me musically a lot (especially Genesis)
At the appearance of these pieces I was only 10 and still listened to other music… but that was then over at the latest with 14. (to the chagrin of my parents)
One year later the (for me) masterpiece of Genesis was released.
Here beautifully illustrated: Supper’s ready
73 Armin