Brian Mantleís letter in issue 400 about Bob Menziesí Buicks also mentioned his 1949 Cadillac. I can provide some information about the fate of the Cadillac.
From November 1964 to February 1965 I was working for two orchardists Bruce Genge and Ernie Woods on Mangrove Mountain, west of Gosford NSW.
The Menzies car had come into the ownership of a neighbouring bee-keeper.
I used to see it frequently gliding past.
ED It never fails to amaze me, the things you lot come up with...