![]() |

| Superboy #56 | ||
| DC Comics, 4/57 | ||
| Otto Binder and Jerry Coleman stories | Krypto appearance. | |
| Curt Swan and John Sikela art | ||
| Curt Swan and Stan Kaye 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 | 26 | 5.76 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 3.8% | 1 7.7% | 3 19.2% | 1 23.1% | 2 30.8% | 5 50% | 1 54% | 1 58% | 4 73% | 0 73% | 3 85% | 1 88% | 1 92% | 1 96% | 0 96% | 1 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 1 | 7.00 | 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% | 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 | 3.50 | 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% | 0 0.0% | 0 0.0% | 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% |
| Superboy #56 (1957, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 0 9.6 | 0% 0 9.4 | 0% 0 9.2 | 4% 1 9.0 | 4% 1 8.5 | 12% 3 8.0 | 4% 1 7.5 | 8% 2 7.0 | 19% 5 6.5 | 4% 1 6.0 | 4% 1 5.5 | 15% 4 5.0 | 0% 0 4.5 | 12% 3 4.0 | 4% 1 3.5 | 4% 1 3.0 | 4% 1 2.5 | 0% 0 2.0 | 4% 1 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||