Brand Name: [GMcB oval logo] / 7 (tongue and groove)
Company: Gladding, McBean and Company
Brickyard Location: Pittsburg, Contra Costa County, CA
Operating Years: 1943-1962
Years Brick Made: 1943-1962
Description: Tongue and groove firebrick. GMcB oval logo impressed above the longitudinal tongue. Number "7" impressed below the longitudinal
Comments: For more information, see under "Brickmakers" the Gladding, McBean and Company, Pittsburg.
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