| 
 | The ornamental design for a golf putter head, substantially as shown and described. | |||||||||||||||||
FIG. 1 is a perspective view of a golf putter head showing my design;
FIG. 2 is a side elevation view;
FIG. 3 is a bottom plan view;
FIG. 4 is a top plan view;
FIG. 5 is a front elevation view; and
FIG. 6 is a rear elevation view.
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