Uncanny X-Men (1981) #221 CGC Very Fine/Near Mint 9.0 Off-White to White Pages
1st appearance of Mister Sinister (Nathaniel Essex). Marauders appearance.
September 1987
Marvel Comics
Cover & art by Marc Silvestri & Dan Green
Population 562 in 9.0, 8,520 total books graded at CGC.
