Five different insulators on the same pole
By Paolo De Pasqual; posted April 27, 2011
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From left to right: unipart Delta Richard-Ginori 1938, unipart Delta Rosenthal (Germany), 2-parts glazewelded Delta Rosenthal with saddle groove dated 1923, 2-parts glazewelded Delta Rosenthal without saddle groove dated 1923, big and heavy 2-parts cemented Weitschirm Richard-Ginori 1957. |