Abstract: A building set for the setting up of a rectangular, upright plate forming the basis for adhered text comprises: (a) two uniform, rectangular plate sections (1,2) with tracks (3,4), dovetailed in cross-section, on the internal sides facing each other, (b) at least one split locking means (5) whose parts (6 and 7) can be inserted into the tracks (3,4) and, upon displacement transversely to the tracks (3,4), fix by wedge effect the two plate sections (1,2) around (c) a vertical end profile (9,10) at either end of the sign. One or both of the end profiles (10) may form a carrier means (13) for the sign, and said carrier means (13) is capable of carrying several signs. This obviates the problem of disfiguring screws, bolts or the like on the vertical side faces of the plate as the two parts (6 and 7) of the locking means (5) may be mutually displaced transversely to the tracks (3,4) by means of screws which are concealed in the space between the plate sections (1,2).