1970’s The Flash #196-197 are now available on DC’s digital backlist.
Flash #196 collects reprints of older stories including “The Mightiest Punch of All Time” (with the Reverse-Flash), “The Speed of Doom,” “The Origin of the Flash’s Masked Identity” and “Mirror Master’s Invincible Bodyguards.”
Flash #197: “Barry Allen takes acting lessons and uses his speed to play several roles almost simultaneously.”