| The falling value of the Scottish currency derived in part from the practice of mixing silver with alloy to produce the base metal billon. |
| Gold was hardly issued at all in the 15th and 16th centuries, and for a time the coinage was mainly billon. |
| The Earth was born in the Sun's plasma and was put by the Sun into the circumsolar orbit more than 4 billon years ago. |
| Large quantities of billon coins were produced in the Roman era, many with a silver wash, and in mediaeval times throughout Europe. |
| As regards security expenditure the study revealed that in 2002, prior to the entry into force of the European regulations, total security related expenditure for the 18 states was between 2.5 and 3.6 billon euros. |
| The same result could be got by taking the billon money of Florence and calculating from its silver contents. |
