@wert Yours is a commemorative medal issued by the province of Ontario in 1967. Your looks to be the gold plate version and it should measure 38 mm. There were 10,000 issued compared to 100,000 of the plain nickel-silver version.
Sorry, I don't know anything about varieties of these. Nor do I have any good Canadian references other than Krause. I'm seeing a lot of token specimens here I have not seen before. I have a bunch more of these, similar to the above.. I'll get up some more pics as I find time and get better organized.