Weatherproof changeable display device

A weatherproof display device for changeable display signs for posting the prices and taxes applicable to a commodity comprising:

• a base assembly having a flat base plate, two triangular support struts rising vertically from each end of said base plate, a horizontal U-shaped channel between said triangular support struts, and two vertically oriented U-shaped support channels rising vertically from said support struts;
• said base assembly being integrally formed from one piece of a strong plastic material;
• a box assembly including from two substantially identical transparent panels, each of said panels having two perpendicular spaced apart tabs along a first vertical edge, the outermost of said tabs forming one side of said box-like structure;
• and each of said panels having two vertically extending perpendicular tabs recessed somewhat inward from a second vertical edge;
• said box assembly being formed by inverting one of said transparent panels and pressing said two panels together such that said outer tabs on the first vertical edge of each panel form the vertical sidewalls of said box-like structure and said inner tabs along the first vertical edge of each panel are gripped snugly by the inner recessed tabs of the opposed panels
• said box assembly being inserted within said U-shaped channels of said base assembly to close its base end;
• a cap assembly formed from one piece of a strong molded plastic having basically an inverted U-shaped horizontal channel whose interior width and depth dimensions correspond to the exterior dimensions of the top of said box-like structure, ends of said horizontal U-shaped channel being closed by end panels and a downward extending tab recessed slightly inward of said end panels to form a gripping channel on each end of said cap assembly;
• said cap assembly fitting snugly across the top of said box-like assembly to fully enclose said box-like assembly;
• and
• said box assembly being easily removable from said base assembly to permit the insertion and removal of pricing books and signs.