The ornamental design for a watch, as shown and described.
FIG. 1 is an enlarged perspective view of a watch showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines shown in FIGS. 1, 2, and 4 to 7 illustrate portions of the watch that form no part of the claimed design. “CITIZEN” and “Eco-Drive” are registered trademarks owned by Citizen Tokei Kabushiki Kaishi TA Citizen Watch Co., Ltd.