The ornamental design for wrist pen holder, substantially as shown and described.
FIG. 1 is a top plan view of a wrist pen holder showing my new design in
extended position, the bottom surface being substantially plain and
unornamented;
FIG. 2 is a perspective view thereof;
FIG. 3 is a top plan view of another embodiment of the wrist pen holder of
FIG. 1, the bottom surface being substantially plain and ornamented; and