Buckle

FIG. 1 is an isometric view of a top, rear, and left side of an ornamental design for a buckle;

FIG. 2 is a left side elevational view of the buckle of FIG. 1 ;

FIG. 3 is a right side elevational view of the buckle of FIG. 1 ;

FIG. 4 is a front elevational view of the buckle of FIG. 1 ;

FIG. 5 is a rear elevational view of the buckle of FIG. 1 ;

FIG. 6 is a top plan view of the buckle of FIG. 1 ; and,

FIG. 7 is a bottom plan view of the buckle of FIG. 1 .

The dash-dash-dash lines are included for the purpose of illustrating portions of the buckle that form no part of the claimed design. The dash-dot-dash lines are included for the purpose of illustrating boundary lines and form no part of the claimed design.