an apparatus for displaying letters , numbers or symbols , especially for marking the prices of goods , with displaceable movable members arranged in a basic body . in order to provide an apparatus of the kind mentioned above which is small and versatile and allows displaying letters , numbers and symbols without requiring a store of the various characters and without requiring any complex puzzle - like composition of the letters , numbers or symbols in order to produce the desired information , it is provided that the movable members are held in the opening by means of a sliding seat or a loose fit .