No idea ……I know what it is BUT I found an old telegraph pole years ago and removed it …I know it’s an insulator …found on Manchester to Sheffield line and that is definite…No idea on manufacturer…. Manufacturer: Gaskell and Grocett (Longport, Stoke-on-Trent). Location: Port Hill Bank, Stoke-on-Trent, England. Active Era: Established 1870; closed 1969. Products: Small electrical, telegraph, and pin-type porcelain insulators. History: The company was forced to close for a land development scheme.
