Good to read all the interest in the 1957 photo i posted some time ago and the speculation about the reason for all those FE's being together.
The book "Glimpses of Gawler" includes this photo and includes a little detail:-
It was the "Centenary of Local Government in Gawler 1957."
"State Premier Thomas Playford and Cabinet members were conveyed in a fleet of FE Holdens from Gawler Railway Station to the Town Hall."
As Glen Curnow said Mavis Curnow was a driver and is third from left. Sixth from left is Bruce Eastick who went on to serve as a SA Member of Parliament and also as Mayor of Gawler.
Since Aero Motors was mentioned thought there might be interest in an old cinema slide i have advertising FCs from Aero Motors.