ELMES, Willard Frederic (1900 - 1956). One Iron in the Fire / Let's Hit While It's Hot. 1929. Chicago: Mather & Company. Among a series of more than 300 Mather Work Incentive Posters designed between 1923 and 1930. Intended to boost worker morale, productivity, and loyalty across the workforce in factories, offices, and retail environments throughout the United States. 47 ? x 40 ?" frame. 43 ? x 36" view. As issued with two small holes punched along upper edge. Not examined outside frame. A.