The ornamental design for a continuous wallpaperborder, as shown and described.
The sole FIGURE is a top plan view of a continuous wallpaper border showing
my new design. The ends of the wallpaper border are shown broken away to
indicate indeterminate length, it being understood that the pattern
repeats uniformly throughout the length of the wallpaper border.
In the drawings, the broken line showing of labeled portraits is for
illustrative purposes only and forms no part of the claimed design.