What was Norman Rockwell's first Post cover?

Boy with Baby Carriage or Salutation The picture shows three young boys on a Sunday afternoon. Two boys are off to play Baseball. They are dressed in baseball uniforms with baseball caps and baseball gloves. Both are making goofy faces and gestures to the third boy. The third boy, dressed in his Sunday best clothes, has his baby sister in a baby carriage taking a stroll. He also has a baby bottle in his breast pocket. He looks livid about the other boys' demeaning gestures. Boy with Baby Carriage was only one of 322 of Norman Rockwell Saturday Eveninbg Post covers.

Judging by the way his hat strap is flying backwards, the third boy is pushing the stroller past his tormentors as fast as he can! When he was painting the three boys in this illustration, Rockwell only used one model, Billy Paine. Billy was Rockwell's favorite model for many years. He appeared in many of Rockwell's works.