I WAS GIVEN BY MY UNCLE,A STEEL PIECE MADE FROM THE "AIR FLASK" RETRIEVED BY THE USS GUADALCANAL. IT STATES,"U-68 SUNK. 10 APRIL, 1944 BY THE U.S.S. GUADALCANAL". THE PIECES WERE GIVEN TO THE CREW UNDER THE AUTHORITY OF CAPT. GALLERY. I AM TRYING TO AUTHENTICATE THIS OFFICIALLY, BUT NO ONE SEEMS TO KNOW MUCH. APPARENTLY, MOST WERE THROWN AWAY. CAN ANYONE RECALL THIS OR HAS A WEB SITE IIN WHICH THERE MIGHT BE A RECORD OF SUCH AN EVENT? THANKS