The ornamental design for an emblem, as shown and described.
FIG. 1 is a perspective view of an emblem showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a perspective view of an emblem in an environment of use;
FIG. 4 is a right side elevation view of FIG. 1; and,
FIG. 5 is a sectional view taken along 5-5 of FIG. 2.
The broken line portion of the figure drawings is included to show environment that forms no part of the claimed design.
The rear views form no part of the claimed design and are omitted. The emblem has 4-way ninety-degree overall symmetry such that the right-side view of FIG. 4 is identical to the top, bottom, and left side views, which are omitted.