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 is the name of a composition of finely-powered silica and gum-shellac - patent #85018 Dec. 15, 1868 by J.M. Merrick.