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| Sub-Mariner #8 | ||
| Marvel Comics, 12/68 | ||
| Roy Thomas story | Sub-Mariner vs. Thing. | |
| John Buscema and Dan Adkins art | 1st Silver Age appearance of Betty Dean. | |
| John Buscema cover | Vision and Giant-Man cameo. | |
| 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 | 999 | 7.36 | 0 0.00% | 0 0.00% | 7 0.7% | 24 3.1% | 49 8.0% | 83 16.3% | 79 24.2% | 96 33.8% | 109 44.7% | 111 56% | 114 67% | 109 78% | 65 85% | 39 89% | 35 92% | 29 95% | 25 97% | 12 99% | 8 99% | 3 100% | 1 100% | 1 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 57 | 7.56 | 0 0.00% | 0 0.00% | 0 0.0% | 4 7.0% | 6 17.5% | 3 22.8% | 3 28.1% | 4 35.1% | 7 47.4% | 8 61% | 7 74% | 4 81% | 3 86% | 2 89% | 2 93% | 3 98% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 48 | 6.92 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 4 8.3% | 1 10.4% | 2 14.6% | 6 27.1% | 6 39.6% | 4 47.9% | 5 58% | 5 69% | 4 77% | 1 79% | 4 88% | 2 92% | 0 92% | 2 96% | 1 98% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 2 | 6.25 | 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% | 0 0.0% | 0 0.0% | 1 50% | 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% |
| Sub-Mariner #8 (1968, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 1% 7 9.8 | 2% 24 9.6 | 5% 49 9.4 | 8% 83 9.2 | 8% 79 9.0 | 10% 96 8.5 | 11% 109 8.0 | 11% 111 7.5 | 11% 114 7.0 | 11% 109 6.5 | 7% 65 6.0 | 4% 39 5.5 | 4% 35 5.0 | 3% 29 4.5 | 3% 25 4.0 | 1% 12 3.5 | 1% 8 3.0 | 0% 3 2.5 | 0% 1 2.0 | 0% 1 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||