The ornamental design for a watchcase, as shown and described.
FIG. 1 is a front perspective view of a watch case of the present invention.
FIG. 2 is another front perspective view of the case of FIG. 1.
FIG. 3 is a right side elevation view of the case of FIG. 1.
FIG. 4 is a left side elevation view of the case of FIG. 1.
FIG. 5 is a front elevation view of the case of FIG. 1.
FIG. 6 is a rear elevation view of the case of FIG. 1.
FIG. 7 is a top plan view of the case of FIG. 1.
FIG. 8 is a bottom plan view of the case of FIG. 1; and,
FIG. 9 is a scaled view of the case of FIG. 1.
Shading forms no part of the claim. Portions of the watch case shown in broken lines form no part of the claimed design. The broken lines showing a watch and band are for environmental purposes only and form no part of the claimed design.