X-Men 40 from 1968. Just sent this out for grading. Cover art by George Tuska. The Mark of the Monster!, script by Roy Thomas, pencils by Don Heck, inks by George Tuska; the X-Men battle the Frankenstein monster, who is revealed SPOILER WARNING to be an android. The First Evil Mutant!--The Origins of the Uncanny X-Men, script by Roy Thomas, pencils by Werner Roth, inks by John Verpoorten; the origin of Jack ODiamond; Cyclops origin continued. https://facebook.com/theembassycollection