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| X-Men #37 | ||
| Marvel Comics, 10/67 | ||
| Roy Thomas story | 1st appearance of the Mutant-Master. | |
| Ross Andru and Don Heck cover and art | Blob, Vanisher, Mastermind, Unus | |
| and Changeling appearance. | ||
| 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 | 790 | 7.43 | 0 0.00% | 0 0.00% | 8 1.0% | 28 4.6% | 58 11.9% | 74 21.3% | 72 30.4% | 102 43.3% | 75 53% | 47 59% | 80 69% | 65 77% | 34 81% | 34 86% | 34 90% | 23 93% | 24 96% | 9 97% | 11 98% | 6 99% | 3 100% | 2 100% | 0 100% | 0 100% | 1 100% |
| 1 BOOK | Signature | 24 | 6.83 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 2 8.3% | 1 12.5% | 2 20.8% | 0 20.8% | 3 33.3% | 3 45.8% | 3 58% | 0 58% | 1 63% | 5 83% | 3 96% | 0 96% | 0 96% | 0 96% | 0 96% | 0 96% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 21 | 8.61 | 0 0.00% | 0 0.00% | 0 0.0% | 4 19.0% | 2 28.6% | 3 42.9% | 2 52% | 5 76% | 0 76% | 2 86% | 2 95% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 2 | 5.50 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 50% | 0 50% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| X-Men #37 (1967, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 1% 8 9.8 | 4% 28 9.6 | 7% 58 9.4 | 9% 74 9.2 | 9% 72 9.0 | 13% 102 8.5 | 9% 75 8.0 | 6% 47 7.5 | 10% 80 7.0 | 8% 65 6.5 | 4% 34 6.0 | 4% 34 5.5 | 4% 34 5.0 | 3% 23 4.5 | 3% 24 4.0 | 1% 9 3.5 | 1% 11 3.0 | 1% 6 2.5 | 0% 3 2.0 | 0% 2 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 1 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||