The ornamental design for a wallclock, as shown and described.
FIG. 1 is a front elevational view of a wall clock showing my new design;
FIG. 2 is a front elevational view of another embodiment of my new design
of FIG. 1;
FIG. 3 is a right side elevational view typical of both embodiments of my
new design, the top, bottom, and left side views being substantially
similar thereto.
The rear of the claimed design is substantially plain and unornamented and
has thereon a conventional clock mechanism.