The ornamental design for a watch, as shown and described.
FIG. 1 is a front view of the watch of the present invention.
FIG. 2 is a bottom view of the watch of FIG. 1.
FIG. 3 is a right-side view of the watch of FIG. 1.
FIG. 4 is a top view of the watch of FIG. 1.
FIG. 5 is a left-side view of the watch of FIG. 1.
FIG. 6 is a rear view of the watch of FIG. 1; and,
FIG. 7 is a top, right-side, perspective view of the watch of FIG. 1.
The portions of the watch that are shown in broken lines in the drawings are for illustrative purposes only and do not form part of the claimed design.