1936 – Ed Doty


4364 Montgomery Street

Ed Doty changed in 1937 to a curving stamp that incorporated his Concrete Master 16 serial number.

2 Responses to “1936 – Ed Doty”

  1. Andrew Says:

    I recently saw an Ed Doty mark from 10-36 with this same format, so we know he used it as late as October.

  2. Andrew Says:

    And now I’ve seen a mark from 12-36.

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