Here's some Go withs that might be of interest to an insulator collector. Here is 10 1940s and 1950s advertisements for Different railroad compaines. Companies are Union Pacific, Southern Railway system, Canadian National Railways x2, Southern Pacific x2, Canadian Pacific x2, The Canadian, and Association of American Railroads. All ads are in mint condition with no staining or tears. Asking $5+shipping for all 10. Check out my other items for more reduced prices!