Mexico Spanish Colony, Milled Bust, King Of Spain, Carlos IIII, Silver 8 Reale Chopmarked. Assayer TH is recorded for the years 1803-10. The eight reales of Charles IV. Mintages are not known. Used that most of them are in really low grades, this one seems to be in Very fine or excellent fine condition. These colonial period coins circulated freely in the many New World colonies and many were lost in shipwrecks. Milled bust coins were minted at the Mexico City mint from 1772 until 1821, when Mexico. Won its independence from Spain. Like the milled pillar dollar, bust dollars circulated throughout. The new worlds, even serving as legal currency in the United States until 1857. Thank you for looking. Be sure to add letsshop626 to your favorites list. Check out our other items.