Vacor de Mexico began operations in Guadalajara Mexico around 1930. They began making clay marbles only, but added glass marbles in the mid 30's. They have grown steadily, and today are the largest manufacturers of marbles in the world. They are known in the U.S. as "Mega Marbles," a company trade name. In 2006, Vacor De Mexico was purchased by Fabricas Selectas, but the trade name "Mega Marbles" was retained.