![]() |

| Batman #288 | ||
| DC Comics, 6/77 | ||
| David Vern story | Penguin appearance. | |
| Mike Grell & Bob Wiacek art | ||
| Mike Grell 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 | 80 | 9.06 | 0 0.00% | 0 0.00% | 15 18.8% | 22 46.3% | 14 64% | 9 75% | 6 83% | 4 88% | 1 89% | 2 91% | 1 93% | 2 95% | 1 96% | 2 99% | 0 99% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 3 | 9.17 | 0 0.00% | 0 0.00% | 1 33.3% | 0 33.3% | 0 33.3% | 1 67% | 0 67% | 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% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 1 | 9.00 | 0 0.00% | 0 0.00% | 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% | 0 100% | 0 100% | 0 100% | 0 100% |
| Batman #288 (1977, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 19% 15 9.8 | 28% 22 9.6 | 18% 14 9.4 | 11% 9 9.2 | 8% 6 9.0 | 5% 4 8.5 | 1% 1 8.0 | 3% 2 7.5 | 1% 1 7.0 | 3% 2 6.5 | 1% 1 6.0 | 3% 2 5.5 | 0% 0 5.0 | 1% 1 4.5 | 0% 0 4.0 | 0% 0 3.5 | 0% 0 3.0 | 0% 0 2.5 | 0% 0 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 | ||||||||||||||||||||||||