This pin is one in a series of Walt Disney World exclusive pins made for Cast Member to wear on their lanyards for trading with the public. The back of each pin reads Disney's Lanyard Pin Series. This is a square silver pin with Mickey dressed up in a Tuxedo, Top Hat and Cane. This pin is one of the Formal Wear Series which includes #10999, #11274, #12228, #13479, #15324, #17260. Note: Most Cast Lanyard Series, Cast Lanyard Collection, and Global Lanyard Collection pins were released before Disney began placing Hidden Mickey symbols on these pins.