Good morning (my time). Thank you all for the great replies.
Rosinish: I have further information on him in another post yesterday titled Cap badge, etc. for R.C.A.F. Hospital Assistants (
https://www.rootschat.com/forum/index.php?topic=865495.0).
Others: War Service Badge sounds fitting. Perhaps helpful was that the authority cited was 1 Rel 72. He did receive the Canadian Volunteer Service Medal with clasp and the War Medal 1939-1945 and I am now the delighted owner of them.
His service overseas was mainly in Labrador which was not then part of Canada. However, he also had unspecified temporary duties beyond Canada which I understood included participating in the air transport of wounded back to Canada. One of only two stories he ever told about the war was very unusual and suggests he had unusual duties. He said one soldier came in gravely injured without any identification. I suspect he was burned. He was unconscious and in his last breaths when my dad, deeply moved, shouted at him something to the effect of "Who are you? We can't inform your family." The fellow then woke up and said his Regimental Number and immediately died. The numbers were seared on my dad's mind as he recited them to me when he told me the story some 40 years later. It puzzled me how it could be that the meticulous military did not know who the person was and why someone so critical was in now Canadian territory. Only thing I can think of was that he was on a ship a German uboat torpedoed.
Thanks for the help!