1Um red stripe: evolution of an insulator

By Nora Coppo; posted July 25, 2008

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Here shown the oldest and the latest version of the 1Um low red stripe insulator: between these two insulators there's something like half a century! the right insulator is also ink marked RICHARD GINORI on top, and this dates it after july 1930. Um insulators have been produced both in porcelain and glass also by foreign factories, such as BULLER'S and FOLEMBRAY, in the late XIX century.