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| Conan the Barbarian #21 | ||
| Marvel Comics, 12/72 | ||
| Roy Thomas story | Based on the story "The Black Stone" | |
| Barry Windsor-Smith cover and art | by Robert E. Howard. | |
| 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 | 338 | 8.94 | 0 0.00% | 1 0.30% | 33 10.1% | 63 28.7% | 65 47.9% | 50 63% | 39 74% | 33 84% | 15 88% | 13 92% | 8 95% | 10 98% | 3 99% | 2 99% | 1 99% | 1 100% | 0 100% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 8 | 9.03 | 0 0.00% | 0 0.00% | 1 12.5% | 0 12.5% | 3 50% | 1 63% | 1 75% | 0 75% | 2 100% | 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 | 5 | 7.88 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 20.0% | 0 20.0% | 1 40.0% | 1 60% | 1 80% | 0 80% | 0 80% | 0 80% | 0 80% | 0 80% | 0 80% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Conan the Barbarian #21 (1972, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0.3% 1 9.9 | 10% 33 9.8 | 19% 63 9.6 | 19% 65 9.4 | 15% 50 9.2 | 12% 39 9.0 | 10% 33 8.5 | 4% 15 8.0 | 4% 13 7.5 | 2% 8 7.0 | 3% 10 6.5 | 1% 3 6.0 | 1% 2 5.5 | 0% 1 5.0 | 0% 1 4.5 | 0% 0 4.0 | 0% 1 3.5 | 0% 0 3.0 | 0% 0 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 | ||||||||||||||||||||||||