The ornamental design for a beltbuckle, as shown and described.
FIG. 1 is a perspective view of a belt buckle showing a closed configuration of our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back 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;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view of a belt buckle showing an open configuration of our new design;
FIG. 9 is a front view of a belt buckle showing an open configuration;
FIG. 10 is a back view of a belt buckle showing an open configuration;
FIG. 11 is a left side view of a belt buckle showing an open configuration;
FIG. 12 is a right side view of a belt buckle showing an open configuration;
FIG. 13 is a top view of a belt buckle showing an open configuration;
FIG. 14 is a bottom view of a belt buckle showing an open configuration; and,
FIG. 15 is a front view of a belt buckle in a closed configuration shown in environmental use.
The broken lines in the FIGS. 1-14 represent portions of the belt buckle that form no part of the claimed design. The other broken lines in FIG. 15 represent environmental subject matter only and form no part of the claimed design.