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| Sub-Mariner #20 | ||
| Marvel Comics, 12/69 | ||
| Roy Thomas story | Doctor Doom and Triton appearance. | |
| John Buscema 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 | 304 | 7.92 | 0 0.00% | 0 0.00% | 5 1.6% | 22 8.9% | 31 19.1% | 29 28.6% | 30 38.5% | 33 49.3% | 32 60% | 37 72% | 31 82% | 15 87% | 6 89% | 10 92% | 8 95% | 6 97% | 5 99% | 3 100% | 0 100% | 0 100% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 12 | 7.47 | 0 0.00% | 0 0.00% | 0 0.0% | 1 8.3% | 2 25.0% | 1 33.3% | 0 33.3% | 1 41.7% | 1 50% | 1 58% | 1 67% | 1 75% | 1 83% | 0 83% | 1 92% | 0 92% | 0 92% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 4 | 7.18 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 1 25.0% | 0 25.0% | 0 25.0% | 1 50% | 1 75% | 0 75% | 0 75% | 0 75% | 0 75% | 0 75% | 0 75% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Sub-Mariner #20 (1969, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 2% 5 9.8 | 7% 22 9.6 | 10% 31 9.4 | 10% 29 9.2 | 10% 30 9.0 | 11% 33 8.5 | 11% 32 8.0 | 12% 37 7.5 | 10% 31 7.0 | 5% 15 6.5 | 2% 6 6.0 | 3% 10 5.5 | 3% 8 5.0 | 2% 6 4.5 | 2% 5 4.0 | 1% 3 3.5 | 0% 0 3.0 | 0% 0 2.5 | 0% 1 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 | ||||||||||||||||||||||||