Reliance2
Reliance1

Reliance Oil operated from 1940 to 1957. In 1957 they were acquired by Supertest.  They began branding their products as Supertest in 1959.
Maps with years in red are not in my collection - scans of covers have been provided by other collectors.
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1940
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1949
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1951
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1952
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1953
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1955 Cover Icon
1955
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1956
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1957 
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1958