Playing with a co-worker last night in preparation for the KCCC at the end of the month. He hasn't played DG for 5 years.
He pulls out a 1985 Tulsa OK Pro Worlds Discraft Phantom and throws it almost the whole round.
That beats my 1987 Discraft Cruiser that I played with in 2005 as the oldest disc I've seen still in play. My Cruiser is now retired and hanging on my wall.
He also had 2 old Rocs. One was a big bird red roc with a lot of ink all over top and bottom and a couple others I didn't recall.