PRIZE COMICS WESTERN #83, 1950. A very nice detailed cover, with a nice dynamic layout.
JUSTICE TRAPS THE GUILTY #22, 1951. And some good violent fun on this one, with some nice inking.
BLACK MAGIC #12[v2n6], 1952. Sorry the scan isn't so good for this one, but still a nice cover, especially with the typical Kirby scientist type.