Abstract: A security display case provides top and bottom frames, each comprising an inner frame nested within an outer frame. The inner frames are assembled around top and bottom panels, and side panels are provided along their top and bottom edges with components for the outer frame which are inserted laterally into channels formed in the inner frame. Once the door is mounted the ends of the inner frame channels are closed off, and the side panels cannot be removed. The resulting display case is secure yet has no vertical frame components, leaving an unobstructed view of the display compartment.