I was at this show as well and I also remember it being Def Leppard as well. Somethings not right. I even remember talking to the security guards after the show and they were telling us that Billy had already left with the guys in Def Leppard. So, not sure what's up with these dates.
Do you remember who opened for Billy at this concert? I was there, and I swore it was Def Leppard, but according to their lists, they didn't sign on until March of 1983.