Abstract: A breakdown type signboard includes at least one elongated "U" shaped panel and two side members with the side members having tenons and with the legs of the "U" shaped panel having mortise elements for interfitting with the tenons. The tensons may be partly hollow to receive a screw or other enlarging element to lock the "U" shaped panel to the side members.

Abstract: A system for mounting signs to posts comprising a bracket having a plurality of sides provided with a longitudinal slot in one of its sides, two post engaging projections on another of its sides and at least one opening transverse to the slot, also comprising a sign capable of being introduced in the slot having at least one opening which is in alignment with those in the bracket. The whole being adapted to be securely held to the post by a strap or straps which extend(s) through the recess(es) and tightly wrapped around the post so as to retain the sign and the bracket at the same time.