Westinghouse Industrial Union - Springfield Massachusetts. UE Locals 202 & 220. The earlier pins from 1937 have UERW before they added the M apparently.
A blog archiving the history of struggle-based, rank-and-file led, militant trade unions through pamphlets, photos & other union ephemera. This blog focuses on C.I.O. unions (1935-1955), and the American "Left's" involvement in social movements. An injury to one is an injury to all!