Cover is an edited photo with a hand-drawn background illustration.
Inside front cover; black and white. Two illustrations with typeset text.
Faces with rather big ears and horses often moving as if flying are points to notice on Sparky Moore art, and later the many closeup faces in sideview. He had most of the stories in Dell's Rin Tin Tin, and also several on Mack Brown and other westerns. He is credited on Johnny Mack Brown by Jerry Bails' Who's Who.
Text story with two 1/4 page illustrations.
Most probably this is the work of Marsh, and the faces on page 3 have some of his characteristic protuding lips. The horses are clearly his, as the face of the old man with strawhat. He is credited on Mack Brown by Jerry bails's Who's Who, and had most of the early ones.
A generic western story, not Johnny Mack Brown.
Inside back cover; black and white. Two illustrations and hand-lettered text.
Back cover. Color photo.