There is very little information on the net about Canadian brands, especially the western ones, except for sites like Old Gasoline Signs. Gas and Oil Products was bought out by Anglo American Exploration of Calgary in 1953. In 1963 British American bought the company and continued to run it until 1965. Purity 99 gas stations disappear from the phone books in 1966. The other week I sold a red striped quart with the blue Purity letters, same as the far right quart, for $125 Cdn. to a local big quart collector. It was in good condition but not mint. Condition is paramount and to me getting a $100 for your quart would be really amazing. Of course so many things are happening in this hobby these days that the unbelievable is becoming the new normal. Cheers, Don