I claim the ornamental design for a bridge of a guitar, as shown and described.
FIG. 1 is a perspective view of a bridge of a guitar, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is an enlarged view of the bridge of a guitar shown in FIG. 1;
FIG. 9 is an enlarged view of the bridge of a guitar shown in FIG. 2;
FIG. 10 is an enlarged view of the bridge of a guitar shown in FIG. 4; and,
FIG. 11 is an enlarged view of the bridge of a guitar shown in FIG. 5.
The dash-dash broken lines in the drawings represent the environment of the claimed design only and form no part thereof. The dot-dash broken lines in the drawings define the bounds of the claimed design and form no part thereof.