Horse coins are most often manufactured from copper or bronze, but in a few documented cases they may also be made from animal horns or ivory.
[2] The Rites of Zhou describes a "dragon colt" as a horse which is "more than 8 chi (尺) tall" when its measured from its front hoof to the shoulder.
As horse coins from the Yuan dynasty are extremely rare there has not been much research undertaken in determining their usage and origins.
[9] Horse coins are referred to in Mandarin Chinese as either maqian (馬錢) or dama qian (打馬錢).
[10] References to Ferghana horses have been traced back as far as the reign of Emperor Wu of the Han dynasty.
[10] Only a single specimen of a Ferghana horse coin with an identical obverse and reverse design (合背錢) dating to the Song dynasty is known to exist, it is 31 mm (1.2 inches) in diameter.