During the late 1970's the army held open days at the Watsonia barracks in Melbourne's Northern suburbs .
At the time, sitting in storage in a shed was a ceremonial series 1 . It had the hand rail for a person of importance to hang on to . It may be the vehicle now at the army Bandiana museum near Wodonga ? Anyway it was in immaculate condition when I spotted it at Watsonia all those years ago. It could have been a 86" but I'm not certain Mike
