The ornamental design for a watch, as shown and described.
FIG. 1 is a top view of the watch of the present invention.
FIG. 2 is a bottom view of the watch of FIG. 1.
FIG. 3 is a front view of the watch of FIG. 1.
FIG. 4 is a rear view of the watch of FIG. 1.
FIG. 5 is a right side view of the watch of FIG. 1.
FIG. 6 is a left side view of the watch of FIG. 1; and,
FIG. 7 is a top, right-side perspective view of the watch of FIG. 1.
The structural features depicted by the broken lines in FIGS. 2 through 7 have been shown for the purpose of illustrating portions of the watch that from no part of the claimed design.