Metal Polishers', Buffers', Platers' and Allied Workers' International Union

The Metal Polishers', Buffers', Platers' and Allied Workers' International Union (MPBP) was a labor union representing metal workers in the United States and Canada.It was chartered by the American Federation of Labor, but the Brass Workers remained a significant force in the industry, particularly after 1895, when it was joined by many metal polishers formerly organized in the Knights of Labor Trades Assembly 252.[1][2] On July 2, 1896, the union absorbed the Brass Workers, renaming itself as the Metal Polishers', Buffers', Platers' and Brass Workers' Union of North America, adding "International" to its name in 1899.Having narrowed its focus, it renamed itself as the Metal Polishers' International Union.[1] In 1935, it became the Metal Polishers', Buffers', Platers' and Helpers' International Union,[2] and in 1955, it transferred to the new AFL-CIO.
labor unionAmerican Federation of LaborKnights of LaborInternational Molders' Union of North AmericaInternational Association of MachinistsInternational Jewelry Workers' UnionAFL-CIOInternational Brotherhood of Boilermakers