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| Challengers of the Unknown #17 | ||
| DC Comics, 12/60-1/61 | ||
| Bob Brown cover and art | ||
| 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 | 25 | 6.82 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 4.0% | 5 24.0% | 1 28.0% | 1 32.0% | 1 36.0% | 4 52% | 3 64% | 1 68% | 1 72% | 1 76% | 0 76% | 1 80% | 2 88% | 0 88% | 1 92% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 4 | 8.73 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 25.0% | 0 25.0% | 1 50% | 1 75% | 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% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 1 | 7.50 | 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% | 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% | 0 100% | 0 100% |
| Challengers of the Unknown #17 (1961, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 0 9.6 | 4% 1 9.4 | 20% 5 9.2 | 4% 1 9.0 | 4% 1 8.5 | 4% 1 8.0 | 16% 4 7.5 | 12% 3 7.0 | 4% 1 6.5 | 4% 1 6.0 | 4% 1 5.5 | 0% 0 5.0 | 4% 1 4.5 | 8% 2 4.0 | 0% 0 3.5 | 4% 1 3.0 | 8% 2 2.5 | 0% 0 2.0 | 0% 0 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||