178 A.2d 567 Gavigan, Appellant, v. Bookbinders, Machine Operators, and Auxiliary Workers Local Union No. 97. Supreme Court of Pennsylvania.January 11, 1962. March 13, 1962. Labor law — Seniority rights — Contracts — Collective bargaining agreement. 1. In this action in equity by certain journeymen bookbinders to determine their seniority rights, in which it appeared […]