The ornamental design for a handbag, as shown and described.
FIG. 1 is a front perspective view of an alternative embodiment of the handbag shown in FIG. 1;
FIG. 2 is a front view of the alternative embodiment of the handbag in FIG. 1;
FIG. 3 is a rear view of the alternative embodiment of the handbag in FIG. 1;
FIG. 4 is a right side view of the alternative embodiment of the handbag in FIG. 1, with the left side view being a mirror image thereof;
FIG. 5 is a top view of the alternative embodiment of the handbag in FIG. 1; and,
FIG. 6 is a bottom view of the alternative embodiment of the handbag in FIG. 1.
The broken line showing of stitching, strap assemblies, handles and body of bag are for illustrative purposes only and forms no part of the claimed design.