The ornamental design for a golfputtershaft, as shown and described.
FIG. 1 is a front elevational view of a golf putter shaft in accordance with the present invention;
FIG. 2 is a back elevational view of a golf putter shaft;
FIG. 3 is a left side elevational view of a golf putter shaft;
FIG. 4 is a right side elevational view of a golf putter shaft;
FIG. 5 is a top plan view of a golf putter shaft;
FIG. 6 is a bottom plan view of a golf putter shaft; and,
FIG. 7 is an exemplary diagram of the use of the golf putter shaft thereof the broken lines being shown for illustrative purposes only and form no part of the claimed design.
The broken line showing of the head is for illustrative purposes only and forms no part of the claimed design.