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| Detective Comics #599 | ||
| DC Comics, 4/89 | ||
| Sam Hamm story, Denys Cowan cover | 1st appearance of Henri Ducard. | |
| Denys Cowan, Dick Giordano & | Pin-ups by Bob Kane, | |
| Frank McLaughlin art | Kyle Baker & Mike Mignola. | |
| 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 | 101 | 9.45 | 0 0.00% | 0 0.00% | 41 40.6% | 25 65% | 17 82% | 9 91% | 1 92% | 2 94% | 3 97% | 1 98% | 1 99% | 0 99% | 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% |
| 1 BOOK | Signature | 12 | 9.40 | 0 0.00% | 0 0.00% | 4 33.3% | 3 58% | 2 75% | 0 75% | 1 83% | 2 100% | 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 | 8.00 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 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% |
| Detective Comics #599 (1989, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 41% 41 9.8 | 25% 25 9.6 | 17% 17 9.4 | 9% 9 9.2 | 1% 1 9.0 | 2% 2 8.5 | 3% 3 8.0 | 1% 1 7.5 | 1% 1 7.0 | 0% 0 6.5 | 1% 1 6.0 | 0% 0 5.5 | 0% 0 5.0 | 0% 0 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 | ||||||||||||||||||||||||