This is a set of 12 Bronze Age X-Men comic books published by Marvel Comics. The issues included in this lot are X-Men #160-171, featuring characters such as Magneto, Storm, Cyclops, Wolverine, and Professor X.
The comics were written by Chris Claremont and illustrated by various artists including John Byrne, Dave Cockrum, and Bill Sienkiewicz. This set is a first printing and features the first appearance of several characters.