HERE IS A VINTAGE ORIGINAL VACUUM EXPLOSION WHISTLE ACCESSORY IN USED CONDITION WITH WEAR AND AGING TO RESTORE AS SHOWN. I WAS TOLD THIS IS A 1920'S ACCESSORY BUT I AM UNSURE OF THE APPLICATIONS OR COMPLETENESS OF THIS ITEM SO PLEASE USE THE PHOTOGRAPHS TO JUDGE APPLICATIONS FOR YOURSELF.  ALL OF OUR ITEMS ARE OLD USED OR VINTAGE PARTS AND WILL HAVE POSSIBLE WEAR, AGING, AND DENTING SO PLEASE LOOK THE PHOTOGRAPHS OVER WELL AS THEY ARE A MAJOR PART OF THE DESCRIPTION.