| Marvel Age Introductions by On-Sale Date |
| 1968 | AUG 13 | XMN049A | The X-Men | [XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris] [INTROMesmero] |
| 1968 | SEP 10 | XMN050A | The X-Men | [XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris] [Mesmero] |
| 1968 | OCT 10 | XMN051A | The X-Men | [XMROS•Professor X • Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Erik the Red][Mesmero] |
| 1968 | NOV 12 | XMN052A | The X-Men | [XMROS•Professor X • Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Mesmero] |
| 1969 | MAY 13 | XMN058 | The X-Men | [XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl] [Polaris][Havok][Banshee][Mesmero] |
| 1969 | JUL 15 | XMN060 | The X-Men | [XMROS•Angel • Beast • Cyclops • Iceman • Marvel Girl • Polaris] [Havok][Banshee][Quicksilver • Scarlet Witch ][Sauron][Mesmero] |