The ornamental design for an instrumentgaugecluster, as shown and described.
FIG. 1 is an front elevational view of an instrument gauge cluster showing our new design;
FIG. 2 is a perspective view thereof; and,
FIG. 3 is a side elevational view, the opposite side elevational view being a mirror image thereof.
The broken line showings of the indicia on the gauge faces in FIGS. 1-2, and the control rod in FIG. 2, are for illustrative purposes only and form no part of the claimed design. The solid jagged lines in FIGS. 2-3 designate a boundary of the claimed design.