Postage stamps and postal history of Mexico The regency had previously changed the official currency under which one peso equaled 8 reales to a decimal system in which one peso equaled 100 centavos. In making the conversion postal rates were rounded up, for example, the rate of one real being equal to 12.5 centavos was rounded up to 13 centavos. The stamps, as a result, were issued in values of 7c, 13c, 25c, and 50c. These stamps were issued with the year and invoice number and with or without the district name, but some issued in exchange for Eagle stamps were issued only with the Mexico City
Cross of Gold speech caused by the Napoleonic Wars caused United States gold coins to be worth more as bullion than as money, and they vanished from circulation. Governmental response to this shortage was hampered by the fact that officials did not clearly understand what had happened. In 1830, Treasury Secretary Samuel D. Ingham proposed adjusting the ratio between gold and silver in US currency to 15.8:1, which had for some time been the ratio in Europe. It was not until 1834 that Congress acted, changing the gold/silver ratio to 16.002:1. This was close enough to the market value to make it uneconomic to