I claim the ornamental design for a watch, as shown and described.
FIG. 1 is a top isometric view of a watch showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view, the rear elevational view being a mirror Image thereof;
FIG. 4 is a right side elevational view thereof; and,
FIG. 5 is a left side elevational view thereof.
The structural features depicted by broken lines in the drawings have been shown for the purpose of illustrating portions of the watch that form no part of the claimed design.