Label (heraldry)
In heraldry, a label is a charge resembling the strap crossing the horse’s chest from which pendants are hung. It is usually a mark of difference, but has sometimes been borne simply as a charge in its own right.
The pendants were originally drawn in a rectangular shape, but in later years have often been drawn as dovetails. The label is almost always placed in the chief. In most cases the horizontal band extends right across the shield, but there are several examples in which the band is truncated.
As a mark of difference
In European heraldry in general, the label was used to mark the elder son, generally by the princes of the royal house. Differences, or marks of cadency, are the distinctions used to indicate the junior branches (cadets) of a family. The eldest son, during the lifetime of his father, bears the family arms with the addition of a label; the second son a crescent, the third, a mullet, the fourth, a martlet, the fifth, an annulet; the sixth, a fleur-de-lis; the seventh, a rose; the eighth, a cross moline; the ninth, a double quatrefoil. On the death of his father, the eldest son would remove the label from his coat of arms and assume the unmodified arms.