Article support system

An article support system for detachably mounting an article on a support structure, comprising:

• at least a pair of substantially identical bracket plates each including a singular key-way extending completely through the plate between opposite first and second faces thereof, the key-way having side walls diverging from the first face to the rear face of the plate, and the key-way having an entry mouth opening at an edge of the plate,
• wherein the bracket plates can be stacked for attachment to one of said article and support structure with their first faces in abutment to define a first dual key-way of a generally hour-glass cross-sectional configuration and the bracket plates can be stacked with their second faces in abutment to define a second dual key-way of a generally truncated diamond cross-sectional configuration;
• and
• at least a pair of substantially identical supporting keys adapted to be attached to the other of said article and support structure, each supporting key having side walls converging from a first face of the key to a second face thereof,
• wherein the supporting keys can be stacked for attachment to the other of said article and support structure with their first faces in abutment and insertable through the entry mouths of the stacked bracket plates when their first faces are in abutment and the supporting keys can be stacked with the second faces in abutment and insertable through the entry mouths of the stacked bracket plates when their second faces are in abutment.