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Porcelain Insulators from Switzerland

The main maker of porcelain insulators in Switzerland is the Swisse Langenthal Company, but a few other unattributed pieces have been found.  These insulators are identified by U-numbers, but in the range of 1000-3999.  The link below is for the reference book that covers these insulators.

Worldwide Porcelain Insulators (Unipart Pin Types)

Insulators from Switzerland

U-1668

U-1743

U-1775

U-1935

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