Westinghouse Electric & Mfg. Co. In matter of Westinghouse Electric & Manufacturing Company, Lighting Division, and Metal Polishers, Buffers, Platers, Spinners & Helpers International Union, Local No. 3, A. F. of L.; in matter of [same] and Employees Federation Of Westinghouse Electric & Manufacturing Company, Lighting Division (unaffiliated), case nos. R-1706 and R-1707; supplemental decision, and certifications of representatives, May 10, 1940.