Abdul-Aziz was the Sultan of the Ottoman Empire between 1861-1876. During his reign, the empire began to decline economically and militarily. This decline in coinage showed itself as follows: the quality of the coins deteriorated, their metal content decreased, and their weight and size also varied. The coins often contained incorrect information. Abdul-Aziz was the king of Saudi Arabia between 1932-1953. During his reign, the country became independent from the British and modernization began. In coinage, this modernization showed itself as follows: the quality of the coins improved, their metal content increased, and their weight and size were standardized. The coins contained accurate information. Abdul-Aziz's coinage thus reflects two different eras. During his reign in the Ottoman Empire, coinage was characterized by decline, while as the king of Saudi Arabia it was modernization. Here are some specific examples of Abdul-Aziz's coinage: Ottoman Empire: 1861 silver 1 kuruş, 1875 gold 20 kuruş. Saudi Arabia : 1932 silver 1 riyal, 1953 gold 10 riyal. As the king of Saudi Arabia, Abdul-Aziz's money met international standards. The metal content was accurate, the weight and size were standardized, and the information on the coins was accurate.