Supertest Petroleum gave out these handy 4 oz. tin banks to their customers .
I'm not sure about much of their history. They were all from the same era .
I can tell  by the style of the Maple Leaf logo that they were produced after
the spring of 1959 and because they say "All Canadian" , it was before the
company was taken over by British Petroleum in 1971.

If you can supply any other information about these banks I would be happy
to include it in this article

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