E. C. & M. CO. S. F. which stands for Electrical Construction and Maintenance Company of San Francisco was organized on December 23, 1870. The company supplied telegraph wire, insulators, and poles. They also dealt with commercial and private telegraph lines, submarine cables, and various types of fire alarm systems. E.C. & M. CO. is credited with updating Western Union Telegraph lines throughout the western states in which their insulators were nearly exclusively used. E. C & M. CO. underwent reorganization in 1877 and terminated their business operations but continued to have their insulators made by the new incorporated California Electric Works until at least 1880.
Either the Pacific Glass Works from San Francisco, California or the
San Francisco Glass Works was in all probability the manufacturer of
the E. C. & M. CO. insulators. These two companies merged in 1876
to form the San Francisco & Pacific Glass Works.
E. C. & M. CO. insulators were used throughout the far western states including British Columbia and Mexico with the majority used in California and Nevada.
On this particular E. C. & M. CO. insulator the color "Aurora Blue" originated when collectors named this distinctive coloration after finding examples on the route of a telegraph line between Aurora and Candelaria, Nevada which was constructed in 1880 by the Nevada and California Telegraph Company. Several telegraph lines using E. C. & M. CO. insulators were built in this mining region in the 1870's.
E. C. & M. CO. insulators are one of the most specialized insulators collected in the hobby, especially among the west coast collectors. This is because they come in a large assortment of colors ranging from purple to various blues, ambers, greens, aquas, and other exotic colors. They have a lot of historical value since they were used to service telegraph lines to the mining companies, U. S. military posts, lumber mills, and to serve telegraph lines along some of the first built railroads in the far west. In addition, they were used at a time and location when the "American West" was still considered wild.
Embossing (F-Skirt) E. C. & M. CO. S. F. (R-Skirt) [Glass button]
Index # 060