IUOE International Operating Engineers Union Local 12 - 3D Bronze MedallionInternational Operating Engineers Union Local 12 Medallion Built to honor the strength, skill, and legacy of the men and women of the International Operating Engineers Union Local 12, this medallion stands as a powerful tribute to those who build, move, and shape the world with their hands and their machines. Struck in heavy bronze and finished with rich, baked on enamel, this medallion proudly displays the iconic Local 12 emblem a symbol of unity,