V-10400

Marked Silica Diatite Patented Dec. 15, 1868 Norwalk Lock. Co. Found with rose patent #113,842,  December 10, 1873 also by H.H. Elwell. Silica Diatite - patent #85018 Dec. 15, 1868 by J.M. Merrick.

School:

Composition

Manufacturer:

Norwalk Lock

Dates:

C. 1868

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norwalk silica diatite