Luno the White Stallion

Luno The White Stallion was a Terrytoons television series that aired in the mid-1960s. It centered on a little boy named Tim who had a marble Pegasus horse named Luno who would come alive and whisk him off on adventures in far off lands when Tim said the words, "Oh winged horse of marble white, take me on a magic flight". The series was produced by William Weiss.