![]() |

| Showcase #13 | ||
| DC Comics, 3-4/58 | ||
| Robert Kanigher and John Broome stories | 3rd appearance of Silver Age Flash. | |
| Carmine Infantino and Frank Giacoia | 1st appearance of Mr. Element. | |
| 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 | 239 | 4.46 | 0 0.00% | 0 0.00% | 0 0.0% | 1 0.4% | 1 0.8% | 0 0.8% | 3 2.1% | 5 4.2% | 5 6.3% | 10 10.5% | 17 17.6% | 14 23.4% | 14 29.3% | 13 34.7% | 20 43.1% | 16 49.8% | 20 58% | 21 67% | 21 76% | 19 84% | 15 90% | 4 92% | 10 96% | 6 98% | 4 100% |
| 1 BOOK | Restored | 38 | 4.53 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 2 5.3% | 1 7.9% | 0 7.9% | 1 10.5% | 4 21.1% | 4 31.6% | 2 36.8% | 3 44.7% | 2 50% | 3 58% | 3 66% | 6 82% | 3 89% | 1 92% | 2 97% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 3 | 5.33 | 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 33.3% | 0 33.3% | 0 33.3% | 1 67% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 2 | 3.25 | 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% | 0 0.0% | 0 0.0% | 1 50% | 0 50% | 0 50% | 0 50% | 0 50% | 0 50% | 0 50% | 0 50% | 0 50% | 0 50% | 1 100% | 0 100% |
| Showcase #13 (1958, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 1 9.6 | 0% 1 9.4 | 0% 0 9.2 | 1% 3 9.0 | 2% 5 8.5 | 2% 5 8.0 | 4% 10 7.5 | 7% 17 7.0 | 6% 14 6.5 | 6% 14 6.0 | 5% 13 5.5 | 8% 20 5.0 | 7% 16 4.5 | 8% 20 4.0 | 9% 21 3.5 | 9% 21 3.0 | 8% 19 2.5 | 6% 15 2.0 | 2% 4 1.8 | 4% 10 1.5 | 3% 6 1.0 | 2% 4 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||