The ornamental design for a watchcase, as shown and described.
FIG. 1 is a front view of a watch case of the invention showing a profile
of particular interest.
FIG. 2 is a view showing an object of the invention as it may be worn; and,
FIG. 3 illustrates the design without environmental features.
Broken line showing of watch face features including window and control
buttons, as well as broken line drawing of the human hand is for
illustrative purposes only and forms no part of the claimed design.