Reversible panel arrangement

A wall comprising a plurality of panels, each panel having a frame with first and second side walls formed parallel to one another and defining a space therebetween, and an edge member secured to said frame between said first and second sidewalls, said edge member for each panel comprising:

• first and second flat exterior planar surfaces formed parallel to one another and defining a space therebetween;
• an elongated section having in cross section a first planar flat surface extending from one of said flat exterior planar surfaces of said edge member inwardly into said space and being inclined at an acute angle with respect to said one of said flat exterior planar surfaces, a second planar flat surface extending from the other flat exterior planar surface of said edge member inwardly into said space between said sidewalls and being inclined at an acute angle with respect to said other flat exterior planar surface of said other member, one of said first and second planar surfaces extending inwardly from its adjoining side surface toward said frame and the other said planar flat surface extending inwardly into said space from its adjoining side flat exterior planar surface away from said frame, and a third planar flat surface forming with the planar surface extending away from said frame a male portion and forming with the planar flat surface extending toward said frame a female portion, said male and female portions engaging corresponding male and female portions of a indentical edge member of another panel member to guide said corresponding planar inclined surfaces into closely abutting relationship.