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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 | 695 | 7.40 | 0 0.00% | 0 0.00% | 5 0.7% | 23 4.0% | 39 9.6% | 53 17.3% | 68 27.1% | 83 39.0% | 80 51% | 75 61% | 54 69% | 50 76% | 48 83% | 19 86% | 33 91% | 16 93% | 19 96% | 13 98% | 7 99% | 4 99% | 5 100% | 0 100% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 36 | 6.64 | 0 0.00% | 0 0.00% | 0 0.0% | 1 2.8% | 0 2.8% | 1 5.6% | 4 16.7% | 4 27.8% | 5 41.7% | 1 44.4% | 6 61% | 0 61% | 1 64% | 3 72% | 4 83% | 1 86% | 2 92% | 1 94% | 0 94% | 0 94% | 0 94% | 1 97% | 0 97% | 0 97% | 1 100% |
| 1 BOOK | Restored | 30 | 7.29 | 0 0.00% | 0 0.00% | 0 0.0% | 1 3.3% | 1 6.7% | 3 16.7% | 5 33.3% | 3 43.3% | 1 46.7% | 3 57% | 3 67% | 2 73% | 3 83% | 1 87% | 2 93% | 0 93% | 0 93% | 0 93% | 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% 39 9.4 | 8% 53 9.2 | 10% 68 9.0 | 12% 83 8.5 | 12% 80 8.0 | 11% 75 7.5 | 8% 54 7.0 | 7% 50 6.5 | 7% 48 6.0 | 3% 19 5.5 | 5% 33 5.0 | 2% 16 4.5 | 3% 19 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 September 16, 2025 | ||||||||||||||||||||||||