A well constructed display of colorful paper associated with railroad company stocks presented the background for insulators used by railroad, telegraph and telephone companies. Although most insulator manufacturers embossed their names on their products, many of the railroad, telegraph and telephone companies in the United States and Canada ordered insulators with their names embossed on the units to help identify their lines along communication right-of-ways.
In Canada, the "Dwight Pattern" single petticoat style insulators in both glass and porcelain marked many of the early telegraph companies such as Great Northwestern and Montreal. Both the Canadian Pacific Railway Co. and its successor Canadian National Railway used this same style.
The larger double petticoat style was also used by other Canadian companies such as H.B.R., E.D.R., T.C.R., G.N.W. TEL.CO. and G.T.P. TEL. CO. and was the preferred style used by Postal Telegraph in the United States. NATCo. marked insulators were produced in both glass and in porcelain.
Also on display were railroad insulators marked with B & O in glass and porcelain, MP in porcelain, P.R.R. and P.L.W., as well as telephone company markings such as New Eng. Tel. & Tel. Co., Am. Tel. & Tel. Co., A.T. & T., U.S. Tel. Co. and S.B.T.&.T. Co.