HERE IS A PENNSYVANIA ORNATED LOCK AND KNOBBY KEY. THE ORNATED, PRR ON THE BACK HAS BEEN WORN DOWN. THE LOCK OPENS EASILY. TURN THE KEY AND PUSH THE HASP BACK INTO THE LOCKED POSITION. SOME OF THESE OLDER LOCKS WERE MADE THAT WAY. THE DUST COVER SPRINGS BACK AFTER OPENING. THEY ARE BOTH MADE BY THE FRAIM, MANUFACTURER. THE T & T D IS ON BOTH THE LOCK AND THE KEY. I AM NOT SURE WHAT THEY STAND FOR. IT MIGHT BE - TOOL & TRANSPORTATION DIVISION. IT COULD BE THE, TIDOUTE & TIONA DIVISION. EMAIL ME WITH ANY QUESTIONS. THANK YOU

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