Porcelain Insulators from Bulgaria

The porcelain 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 Bulgaria

U-1234

U-1268

U-1284

U-1654

U-1692

U-1705

U-1735

U-1770

U-1831

U-2121

U-2294

U-2667

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