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| Detective Comics #388 | ||
| DC Comics, 6/69 | ||
| John Broome and Frank Robbins stories | Joker appearance. | |
| Bob Brown, Joe Giella, Gil Kane and | Batgirl backup story. | |
| Murphy Anderson art, Irv Novick 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 | 210 | 7.73 | 0 0.00% | 0 0.00% | 0 0.0% | 9 4.3% | 17 12.4% | 16 20.0% | 30 34.3% | 27 47.1% | 24 59% | 22 69% | 15 76% | 15 83% | 8 87% | 10 92% | 4 94% | 4 96% | 1 96% | 3 98% | 4 100% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 4 | 7.63 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 2 50% | 0 50% | 0 50% | 1 75% | 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% |
| 1 BOOK | Signature | 3 | 8.97 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 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% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 1 | 4.50 | 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% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Detective Comics #388 (1969, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 4% 9 9.6 | 8% 17 9.4 | 8% 16 9.2 | 14% 30 9.0 | 13% 27 8.5 | 11% 24 8.0 | 10% 22 7.5 | 7% 15 7.0 | 7% 15 6.5 | 4% 8 6.0 | 5% 10 5.5 | 2% 4 5.0 | 2% 4 4.5 | 0% 1 4.0 | 1% 3 3.5 | 2% 4 3.0 | 0% 1 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 | ||||||||||||||||||||||||