Most of the Clan Campbell Societies, world-wide, are members of an umbrella organization under direct control of the Chief and called the Federation of Clan Campbell Societies.
This was originally created to enable the Societies to use heraldic arms as granted to the Chief by the Lord Lyon King of Arms in Scotland for the Federation. This was necessary since in Scotland there is no such thing as "Clan arms".
The Boar's Head at the top of the device is the Clan Badge. It is the Crest of the Chief of the Clan Campbell and part of his Coat of Arms. The Boar's Head surrounded by a Buckle signifies a Clan member. Only the Chief may use the Boar's Head standing alone.
The arms (or shield) is worn as a badge by Society members. It is described in heraldic terms as Gyronny of Eight, Or and Sable (divided in eight sections of gold and black). On it, the global extent of Clan Campbell Societies, and the links which bind them together are represented by the world surrounded by a chain, both in silver.