Oval cistern

Description

FIG. 1 is a top, left, perspective view of an oval cistern showing the new design;

FIG. 2 is a top, right, perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a rear view thereof.

Claims

The ornamental design for an oval cistern as shown and described.