Three faceted broken front face of a retaining wall block

Building units and construction elements – Architectural stock material – Construction block or brick type

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D03805603

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Keystone Retaining Wall Systems, "Take Your First Look at the Ultimate in Retaining Wall Systems. Keystone" (1986).
The Besser Company brochure, "Modular Concrete Block", 1984.
The Besser Company brochure, "Paving Stone", Jun., 1984.
The Hollow Building Tile Assoc. Handbook, p. 11, Jan. 1924.
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Keystone Specifications and Installation Guidelines; 1986 Building Stone Walls; by John Vivian; 1976.
Keystone Retaining Wall Systems Publication dated 1986, p. 2, upper right corner of pg. tap traucated block.
Diamond Wall System dated 1988 block illustration center left side of page.
The Besser Company Bulletin, Feb. 1985.

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