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| Sub-Mariner #31 | ||
| Marvel Comics, 11/70 | ||
| Roy Thomas story | Thing, Triton, Stingray and | |
| Sal Buscema and Mike Esposito art | Attuma appearance. | |
| Sal Buscema cover | Letter from Neal Pozner. | |
| 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 | 139 | 8.54 | 0 0.00% | 0 0.00% | 15 10.8% | 18 23.7% | 25 41.7% | 16 53% | 13 63% | 15 73% | 9 80% | 7 85% | 4 88% | 2 89% | 5 93% | 3 95% | 2 96% | 2 98% | 1 99% | 1 99% | 0 99% | 0 99% | 0 99% | 0 99% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 4 | 8.38 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 2 50% | 1 75% | 0 75% | 0 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% |
| 1 BOOK | Qualified | 1 | 9.00 | 0 0.00% | 0 0.00% | 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% | 0 100% | 0 100% | 0 100% |
| Sub-Mariner #31 (1970, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 11% 15 9.8 | 13% 18 9.6 | 18% 25 9.4 | 12% 16 9.2 | 9% 13 9.0 | 11% 15 8.5 | 6% 9 8.0 | 5% 7 7.5 | 3% 4 7.0 | 1% 2 6.5 | 4% 5 6.0 | 2% 3 5.5 | 1% 2 5.0 | 1% 2 4.5 | 1% 1 4.0 | 1% 1 3.5 | 0% 0 3.0 | 0% 0 2.5 | 0% 0 2.0 | 0% 0 1.8 | 1% 1 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||