HERE IS A VERY UNIQUE FIND. THIS IS A EMERGENCY CREW WARNING BELL FOR THE U.S.A.F . THIS WAS PROABLY ON A PARACHUTE WARNING SYSTEM BUT NOT SURE. THIS IS A EDWARDS PART NO. 169-2. THIS COMPANY IS STILL VERY ACTIVE AND THERE PRODUCTS ARE TOP OF THE LINE. THIS ALONE IS OVER $100.00. PLEASE LOOK AT THERE WEBSITE. THIS IS EVEN MORE COLLECTABLE SINCE IT BEING FROM THE UNITED STATES AIR FORCE. PLEASE LOOK AT THESE PHOTOS. I AM NOT SURE OF THE VOLTS, AND DIDN'T WANT TO TEST IT. WILL BE SOLD UNTESTED. THANKS FOR LOOKING. ALL ITEMS ARE SOLD AS-IS. GOOD LUCK AND HAPPY BIDDING.