Possible survey tag, badge, or pin? About the diameter of a silver dollar. Concave back. Looks like it may have had a pin soldered to the back. Found in King Co., WA. Your thoughts are appreciated!
Correct... Circa 1930's. The Washington Emergency Relief Administration (WERA) supervised numerous construction and repair projects in the state. In Seattle, it built the Montlake playfield field house and the Montlake Community Clubhouse, which has since acquired the name "Tudor Building," after its architecture. Other projects in Washington were of an agricultural nature. Among these were a rural electric survey of the state, research on the development of new fruit by-products, research to determine the vitamin C content in Washington apples, a survey of part-time farming, and research on the use of by-products of the fishing industry as feed for the poultry industry. (WSU MASC) https://content.lib.washington.edu/feraweb/essay.html