AC DC "Back in Black", on a 33 1/3 when I was 10 on 1976.
Discussion
No. My mistake, Led Zeppelin IV

Just when i thought the last one couldn't be topped 😂 Please tell me you still have them 🙏
No. I changed with the times. The vinyl replaced our 8 track tapes. Then I went with cassettes. Then CD/DADs. Then it was mp3 and now I just use Apple Music.
Times change and as a kid you can't imagine albums would have a cache to your kids.