US D378231 S
FIG. 1 is a perspective view of a crystal knob set for plumbing faucets showing my new design, it being understood that the broken lines are for illustrative purposes only and forms no part of the claimed invention;
FIG. 2 is a side elevation view of one of the knob set;
FIG. 3 is a bottom plan view of the knob set;
FIG. 4 is a top plan view of the knob set;
FIG. 5 is a front view of the knob set; and,
FIG. 6 is a rear end view of the knob set.