In March 1937 a group of workers at Westinghouse Electric Corporation started to organize a union. Bert McClure, an electrician, acting as a volunteer organizer in Hamilton, contacted the United Electrical union at Buffalo, New York and charter number 504 was issued. In 1977, 504 divided into 504 and 550. In 1992 the United Electrical union was merged into the National Automobile, Aerospace, Transportation and General Workers Union of Canada (CAW Canada). CAW merged with Communications, Energy and Paperworkers Union of Canada (CEP) to form Unifor, maintaining Local 504. An early history by C. S. Jackson, "UE Canada: 30 Years, 1937-1967", can be found in the master file.