This ribbon bar came from a local estate sale belonging to a fellow who had joined the RCAF in early 1940's. He would soon go overseas with RCAF and flew in missions based out of England. He was an Aerial Gunner. This information I obtained after the fact from his obituary. There is a post war blazer pocket badge for the RCAF 405 Squadron
He ended up the war in Burma as a member of the CACW Chinese American Composite Wing. This group is a bit obscure and were part of the US 14th Air Force. He was an active member in the Burma Star Association travelling to England at times for their reunions. In fact later he belonged to the American Chapter of the Burma Star.
An interesting combination of ribbons to an American. He had lived in Chicago prior to joining the RCAF.
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"We must make our mistakes quickly"
Major General George Alan Vasey CB, CBE, DSO and Bar
New Guinea 1942