Clock

FIG. 1 is a front top perspective view of one embodiment of a clock showing our new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; FIG. 8 is a front top perspective view of one embodiment of a clock showing our new design; FIG. 9 is a front elevation view thereof; FIG. 10 is a rear elevation view thereof; FIG. 11 is a left side elevation view thereof; FIG. 12 is a right side elevation view thereof; FIG. 13 is a top view thereof; and, FIG. 14 is a bottom view thereof. The broken lines illustrate portions of the clock that form no part of the claimed design.