Union concrete masters III

I’ve rustled up a few more numbers in the OPCFIA union bug since the last batch I posted.




Not much to say about these. Hal Bennett’s marks (very few of which are dated) run from 1930 to 1950. L. B. Duffin marks run from 1944 to 1947. And the Fitzmaurice mark II runs from 1926 to 1941.

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