No. 6526. Heard December 6, 1965. Decided January 21, 1966. Anthony J. Obadal, Atty., with whom Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Solomon I. Hirsh, Atty., N.L.R.B., Washington, D.C., were on brief, for petitioner. Murray Brown, Boston, Mass., with whom William F. Joy and Morgan, Brown, Kearns Joy, Boston, Mass., were on brief, for respondents. Before ALDRICH, Chief Judge, and McENTEE and COFFIN, Circuit Judges.