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| Sub-Mariner Comics #28 | ||
| Timely Comics, 10/48 | ||
| Bill Everett story and art | Namora appearance. | |
| Mike Sekowsky and Al Gabriele art | Blonde Phantom backup story. | |
| Don Rico cover | ||
| 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 | 33 | 4.97 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 3.0% | 1 6.1% | 0 6.1% | 0 6.1% | 2 12.1% | 2 18.2% | 2 24.2% | 1 27.3% | 2 33.3% | 2 39.4% | 5 55% | 3 64% | 1 67% | 3 76% | 3 85% | 1 88% | 3 97% | 0 97% | 0 97% | 0 97% | 1 100% |
| 1 BOOK | Restored | 5 | 5.20 | 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% | 1 20.0% | 1 40.0% | 1 60% | 0 60% | 0 60% | 0 60% | 0 60% | 0 60% | 0 60% | 1 80% | 0 80% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Sub-Mariner Comics #28 (1948, Timely Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 0 9.6 | 3% 1 9.4 | 3% 1 9.2 | 0% 0 9.0 | 0% 0 8.5 | 6% 2 8.0 | 6% 2 7.5 | 6% 2 7.0 | 3% 1 6.5 | 6% 2 6.0 | 6% 2 5.5 | 15% 5 5.0 | 9% 3 4.5 | 3% 1 4.0 | 9% 3 3.5 | 9% 3 3.0 | 3% 1 2.5 | 9% 3 2.0 | 0% 0 1.8 | 0% 0 1.5 | 0% 0 1.0 | 3% 1 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||