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The ornamental design for a combined electronic clock and perpetual calendar, as shown and described. |
FIG. 1 is a perspective view of the present design;
FIG. 2 is a top view of the present design;
FIG. 3 is a front view of the present design;
FIG. 4 is a side view of the present design;
FIG. 5 is a rear view of the present design;
FIG. 6 is a bottom view of the present design;
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