![]() |

| X-Men #66 | ||
| Marvel Comics, 3/70 | ||
| Roy Thomas story | Last new story with original X-Men. | |
| Sal Buscema and Sam Grainger art | Hulk and Major Glenn Talbot appearance. | |
| Marie Severin and Sam Grainger 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 | 800 | 7.72 | 0 0.00% | 0 0.00% | 17 2.1% | 42 7.4% | 70 16.1% | 74 25.4% | 68 33.9% | 94 45.6% | 88 57% | 81 67% | 70 76% | 51 82% | 39 87% | 35 91% | 22 94% | 21 97% | 13 98% | 7 99% | 2 99% | 2 100% | 3 100% | 1 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 55 | 7.50 | 0 0.00% | 0 0.00% | 0 0.0% | 5 9.1% | 3 14.5% | 2 18.2% | 5 27.3% | 7 40.0% | 5 49.1% | 9 65% | 2 69% | 4 76% | 3 82% | 3 87% | 2 91% | 3 96% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 8 | 7.66 | 0 0.00% | 0 0.00% | 1 12.5% | 0 12.5% | 0 12.5% | 0 12.5% | 1 25.0% | 0 25.0% | 2 50% | 2 75% | 0 75% | 0 75% | 1 88% | 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 #66 (1970, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 2% 17 9.8 | 5% 42 9.6 | 9% 70 9.4 | 9% 74 9.2 | 9% 68 9.0 | 12% 94 8.5 | 11% 88 8.0 | 10% 81 7.5 | 9% 70 7.0 | 6% 51 6.5 | 5% 39 6.0 | 4% 35 5.5 | 3% 22 5.0 | 3% 21 4.5 | 2% 13 4.0 | 1% 7 3.5 | 0% 2 3.0 | 0% 2 2.5 | 0% 3 2.0 | 0% 1 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||