X-Men #53 from Marvel Comics, published in 1969 and professionally graded CGC 9.4 Near Mint. This Silver Age X-Men issue features the first appearance of Mesmero in the title and continues the classic Roy Thomas and Barry Windsor-Smith run that helped define the early adventures of Marvel's mutant heroes.

High-grade Silver Age X-Men books remain among the most sought-after Marvel comics, with CGC 9.4 examples becoming increasingly difficult to locate due to the challenges of preserving books from this era in Near Mint condition. Collectors pursuing high-grade Silver Age X-Men runs consistently seek strong copies of mid-run issues such as this one.

Featuring appearances by Professor X, Cyclops, Marvel Girl, Beast, Angel, Iceman, and Polaris, this issue represents an important period in the development of the X-Men franchise and is an excellent addition to any serious Marvel Silver Age collection.