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| Sub-Mariner #21 | ||
| Marvel Comics, 1/70 | ||
| Roy Thomas story | ||
| Marie Severin and Johnny Craig | ||
| 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 | 106 | 8.79 | 0 0.00% | 0 0.00% | 5 4.7% | 22 25.5% | 21 45.3% | 20 64% | 6 70% | 13 82% | 5 87% | 1 88% | 4 92% | 1 92% | 4 96% | 1 97% | 2 99% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 5 | 8.58 | 0 0.00% | 0 0.00% | 0 0.0% | 1 20.0% | 1 40.0% | 2 80% | 0 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% | 0 100% | 0 100% |
| 1 BOOK | Restored | 1 | 9.20 | 0 0.00% | 0 0.00% | 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% | 0 100% | 0 100% | 0 100% | 0 100% |
| Sub-Mariner #21 (1970, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 5% 5 9.8 | 21% 22 9.6 | 20% 21 9.4 | 19% 20 9.2 | 6% 6 9.0 | 12% 13 8.5 | 5% 5 8.0 | 1% 1 7.5 | 4% 4 7.0 | 1% 1 6.5 | 4% 4 6.0 | 1% 1 5.5 | 2% 2 5.0 | 1% 1 4.5 | 0% 0 4.0 | 0% 0 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 | ||||||||||||||||||||||||