Russian glass insulators

By George Sukhoff; posted July 21, 2015

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Here are some size one telegraph insulators from different factories. Here you can see DBZ (Д.Б.З. - Donetsk bottle factory), Liv. Obsch. (Лив. Общ. - Livengoff partnership of glass works), Maltsovskoe (Мальцовское - Nechaev-Maltsov's glass factories). These are all from pre-1917's epoch. They were classified as 'telegraph' though were more commonly used on low-voltage distribution lines in urban areas.

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