Uncanny X-Men 1st series #41 VERY GOOD+

First appearance of Grotesk. Cover pencils by Don Heck, inks by George Tuska. Now Strikes...the Sub-Human!, script by Roy Thomas, pencils by Don Heck, inks by George Tuska; the X-Men battle the Grotesk, the last survivor of the Sub-Humans. The Living Diamond!--The Origins of the Uncanny X-Men, script by Roy Thomas, pencils by Werner Roth, inks by John Verpoorten; Jack O'Diamonds wants Scott Summers to help him battle Professor Xavier; Jack O'Diamonds turns himself into a Living Diamond. 36 pgs. $0.12. Cover price $0.12.