Nos. 560, 790, Dockets 79-4156, 79-4184. Argued January 14, 1980. Decided April 28, 1980. Jerold D. Jacobson, New York City (David H. Diamond, Fred Kolikoff, Guggenheimer Untermyer, New York City, of counsel), for employer-petitioner. Robert Sewell, Atty., N.L.R.B., Washington, D.C. (Norton J. Come, Acting Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, Elliott Moore, Deputy Assn. Gen. Counsel, James Y. Callear, Atty., N. L. R. B., Washington