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| X-Men #31 | ||
| Marvel Comics, 4/67 | ||
| Roy Thomas story | 1st appearance of the Cobalt Man | |
| Werner Roth and John Tartaglione art | (Ralph Roberts) and Candy Southern. | |
| Dan Adkins cover | ||
| 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 | 710 | 7.39 | 0 0.00% | 0 0.00% | 5 0.7% | 23 3.9% | 40 9.6% | 54 17.2% | 67 26.6% | 86 38.7% | 82 50% | 77 61% | 55 69% | 50 76% | 50 83% | 19 86% | 35 91% | 17 93% | 20 96% | 13 98% | 7 99% | 4 99% | 5 100% | 0 100% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 38 | 6.71 | 0 0.00% | 0 0.00% | 0 0.0% | 1 2.6% | 0 2.6% | 1 5.3% | 5 18.4% | 4 28.9% | 5 42.1% | 1 44.7% | 7 63% | 0 63% | 1 66% | 3 74% | 4 84% | 1 87% | 2 92% | 1 95% | 0 95% | 0 95% | 0 95% | 1 97% | 0 97% | 0 97% | 1 100% |
| 1 BOOK | Restored | 31 | 7.35 | 0 0.00% | 0 0.00% | 0 0.0% | 1 3.2% | 1 6.5% | 4 19.4% | 5 35.5% | 3 45.2% | 1 48.4% | 3 58% | 3 68% | 2 74% | 3 84% | 1 87% | 2 94% | 0 94% | 0 94% | 0 94% | 1 97% | 0 97% | 0 97% | 0 97% | 0 97% | 0 97% | 1 100% |
| 1 BOOK | Qualified | 5 | 5.54 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 1 20.0% | 0 20.0% | 0 20.0% | 0 20.0% | 0 20.0% | 0 20.0% | 1 40.0% | 0 40.0% | 0 40.0% | 1 60% | 0 60% | 0 60% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| X-Men #31 (1967, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 1% 5 9.8 | 3% 23 9.6 | 6% 40 9.4 | 8% 54 9.2 | 9% 67 9.0 | 12% 86 8.5 | 12% 82 8.0 | 11% 77 7.5 | 8% 55 7.0 | 7% 50 6.5 | 7% 50 6.0 | 3% 19 5.5 | 5% 35 5.0 | 2% 17 4.5 | 3% 20 4.0 | 2% 13 3.5 | 1% 7 3.0 | 1% 4 2.5 | 1% 5 2.0 | 0% 0 1.8 | 0% 1 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated February 24, 2026 | ||||||||||||||||||||||||