15 dineros prietos = 1 maravedi,
Old maravedi = 75 sueldos,
∴ 1 prieto = 5 sueldos.
Old maravedi = 60 maravedis novenes,
∴ 1 prieto = 4 maravedis novenes.
Under Alfonso the Wise, therefore, the system was as follows:—
10 dineros = 1 noveno,
4 novenes = 1 maravedi de los prietos (= 5 sueldos of 8 dineros each).
10 novenes = 1 maravedi de los Burgaleses.
60 novenes = 1 old maravedi.
These novenes, or maravedis blancos segundos, continued current through the fourteenth century, and in the laws of John III. are spoken of as "maravedises of our present currency," and as still = 1⁄10 of the maravedises Burgaleses, which latter are spoken of as "maravedises of good currency" (maravedis de los buenos).
But by the close of the fourteenth century, owing to the depreciation of the currency, the novenes had come to be looked upon as of better denomination than the then current coin, and are accordingly spoken of as "old" (viejos) for distinction's sake.
The only material additions to this system of Alfonso the Wise were briefly—
1. The coronados, an innovation of his successor, Sancho IV. (1284-95), who, in 1286, introduced them as = 1 old dinero. They subsequently appear as cornados.
In the Cortes of Toledo their relation to the novenes was thus determined:—
6 coronados = 10 novenes = 1 maravedi de moneda vieja (= Burgaleses).