I have been unsuccessful in locating a U number for this insulator and would appreciate any help from my Northern neighbors if they are not hunkered down in their bunkers today The NIA website does not list this insulator under either Canadian porcelain or United kingdom examples. A standard wood pin fits perfectly and it measures 4.25" in height and 4.5" in diameter. This example is unmarked but as pictured the dark brown example is marked in an UG ink stamp Canadian Porcelain. All help appreciated. Thanks
ASSIGNED new U-1190 by Bob Berry and can be found on the NIA website Worldwide Porcelain Insulators in the Canadian porcelain folder. Thanks to all who responed with info.