No. 16779. February 24, 1969. Rehearing Denied March 14, 1969. John L. Rosshirt, Chicago, Ill., J.M. Mitchell, New York City, Owen Fairweather, Melvin L. Rosenbloom, Chicago, Ill., John T. Van Aken, R. Theodore Clark, Jr., Chicago, Ill., Seyfarth, Shaw, Fairweather Geraldson, Chicago, Ill., of counsel, for petitioner. Marcel Mallet-Prevost, Asst. General Counsel, Ian Lanoff, Atty., N.L.R.B., Washington, D.C., Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Allison W