No. 75-2152. Argued September 30, 1976. Decided January 28, 1977. Elliott Moore, Deputy Associate Gen. Counsel, Roger T. Brice, John E. Higgins, Jr., N.L.R.B., Washington, D.C., for petitioner. Walter F. Kelly, Peter D. Goldberg, Milwaukee, Wis., for respondent. Before FAIRCHILD, Chief Judge, and TONE and BAUER, Circuit Judges. FAIRCHILD, Chief Judge. This case is brought by the National Labor Relations Board seeking enforcement of its order of September 25, 1975, against the International Brotherhood