A display window assembly is mounted in the opening of a bezel of a housing, and a force is exerted against the assembly by a suitable resilient element urging it outward through the opening. The assembly may be mounted on a support or frame, from which depends one or more tabs extending inwardly of the housing. At least one of the tabs is fastened with a fastener that extends from the exterior of the housing, through a portion other than the bezel and through a surface not generally facing the user when the user is viewing the display. The advancement/withdrawal direction of the fastener is not substantially normal to the display window. However, advancement/withdrawal of the fastener causes movement of the tab, and therefore of the assembly, in an adjustment direction substantially normal to the display window to adjust the position of the display window relative to the bezel.