Abstract: Indicia display means comprising an indicia-bearing member having one or more sets of visible indicia located thereon in predetermined locations, and a mask member arranged to overlay the indicia-bearing member, the mask member having perforations or openings at predetermined locations to expose selected ones of said visible indicia. The mask member may be provided with a mirror image set of said indicia on the reverse side of the mask member to assist in locating the site of said openings or perforations in the mask member. The location of the indicia, the color, and/or the color of the background and/or the color of the mask areas may be used to convey information, in addition to the values assigned to the indicia themselves.