As John M has pointed out there's no way to make a museum completely theft proof. The most effective techniques in our experience have been strong cases (plexi not glass) with security screws which will often foil the casual thief, and having a person in the building being attentive. Good luck. - - - - - - - - - - - - - - - - - - - - - - - - - C. L. Dill, Museum Director State Historical Society of North Dakota 612 East Boulevard Bismarck ND 58505-0830 P: (701)328-2666 F: (701)328-3710 E: [log in to unmask] - - - - - - - - - - - - - - - - - - - - - - - - -