.75" with large union bug stamped into the metal reverse. Extreme outer edge of celluloid has tiniest bit of wear in the form of some pinpoint rub marks but so tiny as to be nearly invisible without magnification. Outer circle of target contains the text and on each side at left and right the letter "W." The interior circles are each numbered with numbers 22 on the outer most circle next to the advertising and becoming higher to the target's center which has the number 25. We estimate the button dates from the 1920's if not earlier. Rare.