This porcelain 1-3/8" pintype suspension related insulator was made by Ohio Brass in the mid to late 1920's. It was used on the ends of arcing horns at the end of a suspension string. The purpose was to control the flux or arcing caused by electrical surges such as lightning etc. This piece does have several surface scratches on the glaze and a small underglaze spot on the rim of the umbrella. (enlarge photo) Measurements: Height: 7" in. Width: 7.5" in. Weight: 6-7lbs

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