This beautiful, hard to find suspension insulator was acquired in the Trinity River area of Northern California. This is an original piece. The 5 glass sleeves are purportedly manufactured by Hemingray. More photos of this fantastic find can be seen starting at [id=109464800] I also have a copy of an article which appeared in the April 21, 1917 issue of Electrical World, titled "Characteristics of Glass Micarta-Core Insulator".