Regnum The 5th Age
The basic currency shared by these 12 empires is the marque. There has been a trend to engrave runes or mystic symbols as the main decoration of marque coins. There are always a special run made for each ruler of one of the twelve empires when a change in power occurs commemorating the event, typically a new coronation or the election to a group ruling body such as the Elector Princes of the Vilgard Federation. Marques are noted for having angular inter-designs on them that correlate to their value. A 5 marque gold coin, for example, will have a pentagon bordering both faces. There are five denominations of gold marques (mq): Tenth Marque (Sliver), Half Marque (half-moon or 5 slivers), Marque (circle; 2 Half-moons or 10 Slivers), 5 Marques (pentagon shaped), and 10(decagon shaped).
With the Half-moons and Slivers it is not hard to see where the phrase breaking change came from. In fact, most merchants have a press to perform this very thing to the Marque coin. In poor locations they will often only have the Sliver press and not the Half-moon.