It was named after the legends on the coin indicating the king's intention of uniting his two kingdoms of England and Scotland.
The legend on the obverse reads IACOBUS D G MA BRI FRA ET HI REX (Iacobus Dei Gratia Magnae Britanniae Franciae et Hiberniae Rex) – James by the grace of God King of Great Britain France and Ireland.
The reverse shows a crowned shield which shows the arms of the four countries separating the letters IR – Iacobus Rex, King James, and the legend FACIAM EOS IN GENTEM UNAM ("I will make them one nation", from Ezekiel 37:22).
The reverse shows a crown over a shield bearing the royal arms and the legend FLORENT CONCORDIA REGNA – Through concord kingdoms flourish.
The reverse shows a crown over the shield with the royal arms dividing the letters "CR" and the legend FLORENT CONCORDIA REGNA.