This is a big 4" litho by Imber of Chicago. Daley became the Cook County Clerk sometime in the late 1940s and held that position until he was first elected Mayor in 1955. This button is from a re-election campaign in the early 1950s. Daley was elected Mayor of Chicago six times and established a family dynasty that allowed his son to be elected Mayor six times. The button is in beautiful NM condition with only the tiniest wear traces in reflected light. Most likely the rarest of Daley buttons.