Carolus IIII (or IV) reigned from 1788 to 1808. The backs of these coins look the same, with a crowned shield and two large pillars on either side.
Like the milled pillar dollar, bust reales circulated throughout the new worlds, even serving as legal currency in the United States until 1857. These colonial period coins circulated freely in the many New World colonies of Spain and many were lost in shipwrecks. Check out my other items. The item "1799 PTS PP Bolivia 4 Reales NGC XF40 Rare Certified Cuzco Hoard Silver Cob Coin" is in sale since Wednesday, April 26, 2017. This item is in the category "Coins & Paper Money\Coins\ World\South America\Bolivia".
The seller is "letsshop626" and is located in Whittier, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Bahamas, Viet nam.