Hi kb,
Re... " I have her Mobilization Attestation Form which shows she only served between 1943 & 1944 and she died in 1973."
I can see a few of her siblings enlisted for WW2. All born at Benalla, Vic, and state either Patrick Vincent GILBERT, or Ida Mary GILBERT, as next of kin.
I still cannot locate her on electoral rolls.
How do you know that she died in 1973?
No KOHN family showing up on the Yarrawonga Cemetery list; however that might not be a complete list for the cemetery.
Is this article, dated, 26 Feb 1953, your John KOHN?
http://trove.nla.gov.au/ndp/del/article/65505849?searchTerm=... kohn"&searchLimits=l-state=Victoria|||l-title=216
Mary