I'VE HAD THIS PIECE FOR OVER 20 YEARS AND FIND IT MOST UNUSUAL. IN MY MANY YEARS OF COLLECTING I HAVEN'T SEEN ANOTHER LAPEL BUTTON LIKE THIS. RAISED LETTERS SPELLING WOW, WHICH IS FOR WOODMEN OF THE WORLD. 
THE PIECE LOOKS LIKE ITS STERLING BUT CAN'T FIND ANY STAMP, IT DOES HAVE THE PATINA OF STERLING THOUGH. THE BACK IS BRASS AND STAMPED E.J.LEIFF OF DENVER.

MEASUREMENTS: 5/8" BY 5/8"