No. 17993. January 4, 1971. Rehearing Denied February 18, 1971. Edwin J. Buckley, Chicago, Ill., J.M. Mitchell, New York City, Owen Fair-weather, R. Theodore Clark, Jr., Andrew M. Kramer, Chicago, Ill., for petitioner; Seyfarth, Shaw, Fairweather Geraldson, Chicago, Ill., of counsel. Marcel Mallet-Prevost, Asst. Gen. Counsel, Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Frank H. Itkin, Baruch A. Fellner, Attys., N.L.R.B., Washington, D.C., for respondent. Before SWYGERT