Uncanny X-Men #135 was my introduction to the X-Men. It came out in April 1980, when I was 10 and had been reading comics for about a year and a half. Jean Grey is still one of my favorite characters. This is a scan of the cover of my actual copy, still in my collection, and it's seen better days. I would read and re-read X-Men issues, and take them everywhere, and so those copies show evidence of that.