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The ornamental design for a plural-nibbed writing instrument, as shown and described. |
FIG. 1 is a perspective view of a plural-nibbed writing instrument showing my new design;
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is an end elevational view;
FIG. 5 is an end elevational view of the end not shown in FIG. 4;
FIG. 6 is a side elevational view; and
FIG. 7 is a side elevational view of the side not shown in FIG. 6.
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