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| X-Men #121 | ||
| Marvel Comics, 5/79 | ||
| Chris Claremont story | 1st full appearance of Alpha Flight. | |
| John Byrne & Terry Austin art | Misty Knight & Colleen Wing appearance. | |
| Dave Cockrum & Terry Austin cover | John Byrne cameo. | |
| Books | CGC Label | CGC Total | Avg. Grade | 10 | 9.9 | 9.8 | 9.6 | 9.4 | 9.2 | 9.0 | 8.5 | 8.0 | 7.5 | 7.0 | 6.5 | 6.0 | 5.5 | 5.0 | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 | 2.0 | 1.8 | 1.5 | 1.0 | 0.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 BOOK | Universal | 4,932 | 8.69 | 0 0.00% | 0 0.00% | 519 10.5% | 858 27.9% | 808 44.3% | 559 56% | 465 65% | 487 75% | 340 82% | 242 87% | 206 91% | 129 94% | 121 96% | 66 97% | 49 98% | 23 99% | 27 99% | 16 100% | 8 100% | 6 100% | 1 100% | 1 100% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 344 | 8.73 | 0 0.00% | 0 0.00% | 43 12.5% | 47 26.2% | 67 45.6% | 40 57% | 41 69% | 27 77% | 22 83% | 15 88% | 16 92% | 4 94% | 6 95% | 1 96% | 4 97% | 6 99% | 1 99% | 4 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 19 | 7.81 | 0 0.00% | 0 0.00% | 0 0.0% | 4 21.1% | 1 26.3% | 3 42.1% | 1 47.4% | 1 53% | 0 53% | 2 63% | 2 74% | 1 79% | 2 89% | 0 89% | 1 95% | 0 95% | 0 95% | 0 95% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 15 | 8.52 | 0 0.00% | 0 0.00% | 0 0.0% | 3 20.0% | 2 33.3% | 1 40.0% | 2 53% | 2 67% | 2 80% | 1 87% | 1 93% | 0 93% | 0 93% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| X-Men #121 (1979, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 11% 519 9.8 | 17% 858 9.6 | 16% 808 9.4 | 11% 559 9.2 | 9% 465 9.0 | 10% 487 8.5 | 7% 340 8.0 | 5% 242 7.5 | 4% 206 7.0 | 3% 129 6.5 | 2% 121 6.0 | 1% 66 5.5 | 1% 49 5.0 | 0% 23 4.5 | 1% 27 4.0 | 0% 16 3.5 | 0% 8 3.0 | 0% 6 2.5 | 0% 1 2.0 | 0% 1 1.8 | 0% 1 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated February 24, 2026 | ||||||||||||||||||||||||