I PURCHASED THESE David Clark Avionics Headset H10-13  S FROM AN ONLINE AUCTION FROM WHICH I HAVE PURCHASED 100'S OF AUTHENTIC ITEMS AND I HAVE LISTED THEM ON THIS SITE AND OTHER SIMILAR SITES AND HAVE SOLD THEM WITH GREAT SUCCESS, FOR DETAILS SEE PICTURES AND DESCRIPTION BELOW:  

I HAVE NOTHING TO TEST THESE David Clark Avionics Headset-Mic Over-Ear Model H10-10 S, THEY ARE SAID TO HAVE BEEN A WORKING ENVIROMENT BUT I HAVE NO WAY TO TELL AS I HAVE NO WAY TO TEST THE HEADSET BUT, THEY APPEAR TO BE VERY LIGHTLY USED AS PICTURED IF YOU CHOOSE  NEW STILL IN ORIGINAL PACKAGE DUST COVERS OVER THE EAR PADS AS PICTURED .