Set of 55, each 2.25x3-1/8" ©Bubbles Inc. and marked "Printed In England." Identical to the Topps set but in a slightly smaller size and on different card stock. Card fronts feature choice art, in many cases quite gruesome such as #36 "Destroying A Dog" in which an alien disintegrates a dog w/his ray gun and #50 "Smashing The Enemy" in which a U.S. soldier splits open an alien's head using the butt of his rifle. Card backs are bw/orange featuring story text plus preview image of the following card. Final card in the set #55 features "A Short Synopsis Of The Story" on front while back is a checklist. This card reads in part "Planning To Conquer The Earth, Mars Sends Flying Saucers Through Space Carrying Deadly Weapons. Burning Cities, The Martians Destroy Much Of Earth's Population." Back of the checklist card has every box marked in ink and titles are also crossed out. The small bw image on nearly every card back has been neatly colored. Margin/corner wear, scattered aging and some w/creases. A lower grade, Good to VG set but a set nonetheless of one of the most desirable Non-Sport issues.