First and Last

What are the earlies and latest survivors of the various model P6 models still on the road? I have never seen this explored, but a post on this forum "Bop Bop" mentioned it in passing.
To start this off:
I have a 3500S Reg. CHJ 805K
Chassis 48100763.
Built 30 Dec 1971 Regi9stered 17 Jan 1972