No. 6154. Heard November 7, 1963. Decided February 17, 1964. Burton A. Zorn, New York City, with whom Jeremiah W. Mahoney, Boston, Mass., George G. Gallantz, Marvin Dicker, Thomas F. Delaney, New York City, Lyne, Woodworth Evarts, Boston, Mass., and Proskauer, Rose, Goetz Mendelsohn, New York City, were on brief, for petitioner. Warren M. Davison, Atty., N.L.R.B., Washington, D.C., with whom Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen