Vintage electric ceramic glaze telephone telegraph pole insulator cap brown 19 49 1900 s hemingray 42 usa 24 48 telephone insulator 4 x 3 5 glass bead bottom.
Ceramic telegraph wire insulators.
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Lot of 3 vtg antique ohio brass knox guy wire insulators ceramic porcelain brown.
19 blue green usa telegraph phone electric.
Vintage insulators are most commonly made out of porcelain or glass materials and they come in a wide variety of colors and shapes making each item a unique.
Set of 2 1930 s large aqua telegraph wire insulators for making light fixtures projects moderncharminteriors.
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Vintage hemingray glass insulator no.
Electric wire insulator brown porcelain ceramic telephone telegraph railroad railway farm threaded lag bolt antique electricity utility.
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Vintage porcelain glass insulator with telegraph wire still attached.
In north america glass was always the predominate material for communications insulators but porcelain has become the standard for power distribution due to its greater strength and surface resistance.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.