This coin commemorated the 400th anniversary of the overland trek of the Cabeza de Vaca Expedition through the Gulf states in 1535. The coin was designed by L.W. Hoffecker, and models were prepared by Edmund J. Senn. The explorer’s name literally translated means “head of a cow”; therefore this device was chosen for the obverse. The reverse bears a yucca tree and a map showing the Old Spanish Trail.