The 1 Johnny Mack Brown issue of Four Color (Dell, 1942 series), 269, was counted by Dell as the first issue of this series.
The Johnny Mack Brown feature continued in Four Color (Dell, 1942 series)#455, #493, #541, #584, #618, #645, #685, #722, #776, #834, #922 & #963 (1953 to 1959); also featuring in Western Roundup (Dell, 1952 series) #1-21