If I recall well enough, this was in 83 time frame. The so called tomb is about what looks to be rectangular in shape 2’x1’, not very big. I don’t recall being able to see inside. A multitude of similar tombs are pushed around so as to get as close to Peter as possible. That is one of the reasons they believe it was Peter’s grave. I believe there was an inscription on one of the graves stating the Peter was nearby as well. This is what I remember although somewhat hazy, after 30 + years.
I’m sure that at the time I was there they had not removed the remains for study.
Thanks!