X-MEN #45 (1968) VF+/VFNM
X-MEN #46 (1968) FN/FN+
X-MEN #48 (1968) FNVF/VF-
X-MEN #49 (1968) 1ST APP OF POLARIS & MESMERO VF-/VF
X-MEN #5 LEGO CASTELLANI SKETCH VAR (2013) 1:100
X-MEN #50 (1968) ICONIC STERANKO COVER ART FNVF/VF-
X-MEN #51 (1968) 1ST APPEARANCE OF SCOTT SUMMERS AS ERIK THE RED FN+/FNVF
X-MEN #52 (1969) FN-/FN
X-MEN #53 (1969) 1ST US WORK OF BARRY WINDSOR-SMITH VF+/VFNM
X-MEN #54 (1969) 1ST APPEARANCE OF ALEX SUMMERS (HAVOK); 1ST APPEARANCE OF LIVING PHARAOH FN-/FN
X-MEN #55 (1969) ORIGIN OF ALEX SUMMERS (HAVOK) VF-/VF
X-MEN #56 (1969) 1ST NEAL ADAMS ON X-MEN; 1ST APP OF AHMET ABDOL AS LIVING MONOLITH VG+/VGFN
X-MEN #58 (1969) 1ST FULL APPEARANCE OF ALEX SUMMERS AS HAVOK VF-/VF
X-MEN #58 (1969) 1ST FULL APPEARANCE OF ALEX SUMMERS AS HAVOK; ICONIC NEAL ADAMS COVER ART FNVF/VF-
X-MEN #59 (1969) ICONIC NEAL ADAMS COVER ART; CAMEO APPEARANCE OF KARL LYKOS (BECOMES SAURON) G
X-MEN #60 (1969) 1ST APPEARANCE OF SAURON FNVF/VF-
X-MEN #61 (1969) VG+/VGFN
X-MEN #62 (1969) 1ST APPEARANCE OF SAVAGE LAND MUTATES VG/VG+
X-MEN #63 (1969) NEAL ADAMS COVER AND ART VF/VF+
X-MEN #64 (1970) 1ST APPEARANCE OF SUNFIRE VF/VF+
X-MEN #65 (1970) NEAL ADAMS ART VF-/VF
X-MEN #66 (1970) FINAL ORIGINAL ISSUE UNTIL ISSUE #94 VF-/VF
X-MEN #67 (1970) FN-/FN
X-MEN #68 (1971) FNVF/VF-