The ornamental design for an elevatorwallsurface having decorative mirrors, as shown and described.
The FIGURE is an orthographic view of an elevator wall surface having decorative mirrors.
The broken-lines illustrate environmental structure and form no part of the claimed design.
The claimed design in the FIGURE concerns a rear wall divided into three panels; the wall is divided into a center glass panel and two mirrored panels flanking either side of the center glass panel. The rear wall includes vertical seams dividing the panel; the seams are visible in the front view but are in the same plane as the illustrated panels, with no depth.