FIG. 1 is a top, front, right side perspective view of the pen;
FIG. 2 is a top plan view thereof, shown at an enlarged scale;
FIG. 3 is a bottom plan view thereof, shown at an enlarged scale;
FIG. 4 is a front elevation view thereof,
FIG. 5 is a rear elevation view thereof, and,
FIG. 6 is a left side elevation view thereof, the right side elevation view being a mirror image.
In the drawings, the broken lines are for the purpose of illustrating environment only, and form no part of the claimed design.