“Master Concrete” holders III

This mark, from Howard Avenue in Piedmont, documents two things. First, it shows that distinguished sidewalk maker Ed Doty held “Master Concrete” number 13, in addition to numbers 16 (1937-38) and 17 (1938-45).

Second, it shows that Doty switched from this stamp to the curved configuration, which incorporates the Master Concrete bug inside, some time between April and September 1937, when he used Master Concrete number 16.

“Master Concrete” holders I

“Master Concrete” holders II

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