We're moving into a new place and have been told by the building's management that the top lock on our door is our own responsibility. It appears that the previous tenants had something in the top lock position and took it with them (or the building removed it after they moved out). I have pictures of what I am talking about, and I would be very grateful if anyone could tell me (a) what kind of lock used to be here? and (b) what other kinds of locks, if any, can we put on our door considering we don't want to have to put a hole in the door frame (see last picture).





