From the Horse of a Different Color Collection. Eagle Spirit Mustang Horse. Made of hand-painted resin. A metal plaque is embedded in the base, showing the title and the exact serial number (out of 10,000) of each horse. Measures 7" high. The Mustang, the wild horse of North America, is descended from thirty Spanish Mustangs brought to the continent by Christopher Columbus in 1493. Escaped, stolen or released horses began to breed, and spread across the West, were today they range in tens of thousands.