Hi Stephen, Graham EDGAR was born between 1933 - 1937 in West Melbourne, Victoria. He fathered three children in Queensland (near Cairns - Babinda & Miriwinni) between 1961 - 1967 but he never married their mother. He listed his name as Graham Francis EDGAR born West Melbourne.
This makes him too young for WWII but I haven't tried for Vietnam. The story is that he died quite young - maybe in the 1970s or 80s but I don't know where & I'm not sure about this story. I have tried newspapers & www.naa.gov.au & also many people on genesreunited but so far to no avail. If only he ad been a few years older. Marilyn