Clock

FIG. 1 is a front perspective view of a first embodiment of our new design for a clock;

FIG. 2 is a rear perspective view of our new design for a clock;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is left side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front elevation view thereof, shown in an environment of use;

FIG. 10 is a front perspective view of a second embodiment of our new design for a clock;

FIG. 11 is a rear perspective view thereof;

FIG. 12 is a front elevation view thereof;

FIG. 13 is a rear elevation view thereof;

FIG. 14 is a right side elevation view thereof;

FIG. 15 is a left side elevation view thereof;

FIG. 16 is a top plan view thereof;

FIG. 17 is a bottom plan view thereof; and,

FIG. 18 is a front elevation view thereof, shown in an environment of use.

The broken lines in the drawings show portions of the clock that form no part of the claimed design.