The ornamental design for a guitarplectrum, as shown and described.
FIG. 1 is a top plan view of a guitar plectrum showing my new design, the
undisclosed bottom plan view being a mirror image thereof;
FIG. 2 is an end elevation thereof;
FIG. 3 is a lower side perspective view thereof;
FIG. 4 is an upper side perspective view thereof, the broken line showing
of a fragmentary human hand being for illustrative purposes only and
forming no part of the claimed design, the upper side being a mirror image
of the lower side perspective view shown in FIG. 3; and,
FIG. 5 is an end elevational view opposite of that shown in FIG. 2.