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| X-Men #21 | ||
| Marvel Comics, 6/66 | ||
| Roy Thomas story | Lucifer appearance. | |
| Werner Roth and Dick Ayers art | ||
| Werner Roth 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 | 1,209 | 7.30 | 0 0.00% | 0 0.00% | 6 0.5% | 35 3.4% | 76 9.7% | 95 17.5% | 117 27.2% | 136 38.5% | 129 49.1% | 115 59% | 94 66% | 87 74% | 80 80% | 52 85% | 55 89% | 34 92% | 49 96% | 19 98% | 14 99% | 1 99% | 4 99% | 4 99% | 0 99% | 1 100% | 6 100% |
| 1 BOOK | Signature | 48 | 7.10 | 0 0.00% | 0 0.00% | 0 0.0% | 1 2.1% | 0 2.1% | 2 6.3% | 3 12.5% | 2 16.7% | 12 41.7% | 4 50% | 6 63% | 5 73% | 5 83% | 3 90% | 2 94% | 1 96% | 1 98% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 19 | 7.48 | 0 0.00% | 0 0.00% | 0 0.0% | 1 5.3% | 1 10.5% | 3 26.3% | 2 36.8% | 1 42.1% | 2 53% | 3 68% | 0 68% | 2 79% | 0 79% | 0 79% | 1 84% | 1 89% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 10 | 5.74 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 10.0% | 0 10.0% | 0 10.0% | 0 10.0% | 0 10.0% | 0 10.0% | 0 10.0% | 3 40.0% | 1 50% | 0 50% | 2 70% | 1 80% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| X-Men #21 (1966, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 6 9.8 | 3% 35 9.6 | 6% 76 9.4 | 8% 95 9.2 | 10% 117 9.0 | 11% 136 8.5 | 11% 129 8.0 | 10% 115 7.5 | 8% 94 7.0 | 7% 87 6.5 | 7% 80 6.0 | 4% 52 5.5 | 5% 55 5.0 | 3% 34 4.5 | 4% 49 4.0 | 2% 19 3.5 | 1% 14 3.0 | 0% 1 2.5 | 0% 4 2.0 | 0% 4 1.8 | 0% 0 1.5 | 0% 1 1.0 | 0% 6 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||