What did the VFA use to distinguish itself pre 1981?
I am not sure I understand this question correctly. Is the question about VFA logos on Team jumpers, or more about what the VFA jumper looked like.
I cannot help with the history of the logo shape but there are some early Interleague VFA team photos on my website.
For many years the VFA and VFL both played in Williamstown style colours. The VFL changed to the big-V after WW1.
I am not sure when they changed to the stripes.
There were no VFA logos on the club jumpers pre-1981.
We are an unofficial VFA / VFL website made up of long time and new supporters of clubs from the Victorian Football Association (now Victorian Football League)..
There are currently 2 users online.