1” with cream lettering on red. Metal back has oval-shaped mark in the shape of a union bug although the black ink obscures any individual letters so nothing is readable. The term “International Labor Day” along with the date of “May 1st” had origins in Australia in 1856 and is generally associated with labor’s fight for an eight hour day and in the early years of the 20th century, was often associated with the “Second International,” an organization of Socialist and Labor parties as well as a commemoration of the people involved in the Chicago general strike known as the “1886 Haymarket affair.” Two pinpoint black dots at button center are under the celluloid and in the printing. N. Mint and displays Mint. Rare.