FIG. 1 is a perspective view of my new design relating to a seat belt buckle, in particular for racing vehicles; FIG. 2 is a front view of my new design; FIG. 3 is a rear view of my new design; FIG. 4 is a left side view of my new design; FIG. 5 is a right side view of my new design; FIG. 6 is a top view of my new design; and, FIG. 7 is a bottom view of my new design.