This is an enlargement of a photo taken in may of 1904 inside the Massachusetts street substation in Seattle . Wa.[id=153961535] The bus bar supported here on Fred Locke gutters provided power for the Puget Sound Electric Railway. These insulators were removed from service by 1920 . Fewer then a dozen of these have ever been found by collectors. Here is a picture of one of these insulators [id=154022716]