The ornamental design for a wristwatch, as shown and described.
FIG. 1 is a front perspective view of a wristwatch showing my new design; the broken lines showing portions of the wristwatch illustrate environmental structure only and form no part of the claimed design.
FIG. 2 is a top plan view of the wristwatch of FIG. 1; the broken lines showing portions of the wristwatch illustrate environmental structure only and form no part of the claimed design.
FIG. 3 is a bottom plan view of the wristwatch of FIG. 1; the broken lines showing portions of the wristwatch illustrate environmental structure only and form no part of the claimed design.
FIG. 4 is a right side elevation view of the wristwatch of FIG. 1.
FIG. 5 is a left side elevation view of the wristwatch of FIG. 1.
FIG. 6 is a front elevation view of the wristwatch of FIG. 1; and,
FIG. 7 is a rear elevation view of the wristwatch of FIG. 1.