The ornamental design for an emblem with legacynumber, as shown and described.
FIG. 1 is a front perspective view of a design for an emblem with legacy number shown with an unclaimed optional design disposed around the emblem in accordance with a first embodiment;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines depict portions of the emblem with legacy number that form no part of the claimed design.