Funny you should mention Billy's Toweling hat, because I know the story behind it.
Billy rode my fathers bikes, the original Curly, up until about 1970 when brother Carl was old enough.
Billy won his first National title at St Kilda STH AU in 1971.
The track was next to a tip and as Billy was on the podium collecting the Duke of Edinburgh Trophy, do they still exist?, Curly placed a toilet seat from the tip around his neck.
Apparently the seat perpetuated for several years, I wonder if it still exists?
In the celebrations that followed, Dad pulled Billy's hat over his head and I remember him wearing it, as a badge of honour, for several years afterwards.
I don't know about everyone else but I'm enjoying it.