Abstract: Records of District 10 of the International Association of Machinists and Aerospace Workers (IAMAW), a union district office covering Milwaukee and southeastern Wisconsin, documenting organizing efforts, wage surveys, administrative and financial activities, arbitration and negotiation with area businesses, and public relations. Included are meeting minutes, financial records, correspondence, membership information, contracts and arbitration materials, newsletters and press releases, convention materials, research and reports, information on apprenticeships, publications, and background on legislative issues.