3.5" w/metal back and horizontal bar pin. Goldberg 439 and Senate-1. A few faint, tiny spots, most notably on the "NN" in "Kennedy". Extremely Fine. Goldberg notes that this button was produced by a couple in Massachusetts for the 1952 campaign and distributed a small number at the time. They saved the rest and when JFK ran for President distributed the remainder. An interesting and bold button capturing both the earliest days of JFK right through to the peak of the 1960 campaign.