FIG. 1 is a perspective view of the sole portion of a golf club putter head embodying our new design; and
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a plan view thereof;
FIG. 4 is a left side elevational view thereof; and,
FIG. 5 is a right side elevational view thereof.
The broken line showing is for illustrative purposes only and forms no part of the claimed design.