Alfonso X, for example, made three issues of "vellón", in each of which the new coin was called a "maravedí". His basic silver coin of 1258-1271 was also called a maravedí ("maravedí de plata"). It weighed 6.00 g and contained 3.67 g of fine silver. It was worth 30 dineros. At that time, the money of account was the Maravedí of 15 Sueldos or 180 Dineros, so that one maravedí as an accounting unit was worth six silver maravedí coins. The silver maravedí money of account represented (according to one interpretation) about 22 g of silver in 1258. This had fallen to 11 g by 1271, to 3 g by 1286, and to 1.91 g in 1303. The gold maravedí had disappeared as a money of account by 1300. The "maravedí de plata" (silver maravedí) gradually came to be used as money of account for larger sums, for the value of gold coins, and for the mint price of silver, and eventually it supplanted the sueldo as the main accounting unit. Alfonso XI (1312–1350) did not call any of his coins a maravedí, and henceforth the term was used only as a unit of account and not as the name of a coin. The ancient measure of Mecca, ordained by Muhammad and known in Castilian Spanish as the "mitcal de la ley", continued to be the basis for measuring the metal content of Castilian coins during the late Middle Ages. The Castilian mark was thus smaller than that of the remainer of western Europe, so as to conform to the "mitcal". The "dobla" continued in this form until the reign of the Catholic Monarchs, but there were many variations in the history of Castilian coins in the intervening years, including the reigns of John II and Henry IV. One complication was the minting by John II of some "doblas" which were made from the metal of coins from Muslim Málaga. These were named ""doblas de la banda"" and were used for many years, although they were not of such fine metal as the traditional form, which in that reign were known as "doblas cruzadas", after the cross appearing in their design. The 15th century was one of extreme monetary confusion in Castile, reaching a peak under Henry IV (1454–1474), who began a simplified standard for currencies.