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| Detective Comics #40 | ||
| DC Comics, 6/40 | ||
| Bill Finger & Jerry Siegel stories | Origin & 1st appearance of Clayface. | |
| Howard Sherman & Fred Guardineer art | 1st Joker cover (from Batman #1 story). | |
| Bob Kane & Jerry Robinson cover & art | Full page ad for Batman #1 | |
| 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 | 75 | 3.93 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 1.3% | 1 2.7% | 3 6.7% | 1 8.0% | 1 9.3% | 1 10.7% | 0 10.7% | 3 14.7% | 4 20.0% | 8 30.7% | 9 42.7% | 2 45.3% | 6 53% | 4 59% | 3 63% | 3 67% | 2 69% | 4 75% | 6 83% | 5 89% | 8 100% |
| 1 BOOK | Restored | 43 | 5.40 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 2 4.7% | 3 11.6% | 5 23.3% | 5 34.9% | 2 39.5% | 4 48.8% | 1 51% | 2 56% | 4 65% | 7 81% | 3 88% | 2 93% | 1 95% | 0 95% | 0 95% | 0 95% | 0 95% | 2 100% |
| 1 BOOK | Qualified | 4 | 1.20 | 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% | 0 0.0% | 0 0.0% | 0 0.0% | 1 25.0% | 1 50% | 0 50% | 0 50% | 2 100% |
| 1 BOOK | Signature | 1 | 6.50 | 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% | 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% |
| Detective Comics #40 (1940, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 0 9.6 | 1% 1 9.4 | 1% 1 9.2 | 4% 3 9.0 | 1% 1 8.5 | 1% 1 8.0 | 1% 1 7.5 | 0% 0 7.0 | 4% 3 6.5 | 5% 4 6.0 | 11% 8 5.5 | 12% 9 5.0 | 3% 2 4.5 | 8% 6 4.0 | 5% 4 3.5 | 4% 3 3.0 | 4% 3 2.5 | 3% 2 2.0 | 5% 4 1.8 | 8% 6 1.5 | 7% 5 1.0 | 11% 8 0.5 |
| cgcdata.com, last updated February 24, 2026 | ||||||||||||||||||||||||