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| Detective Comics #138 | ||
| DC Comics, 8/48 | ||
| Win Mortimer cover | Joker appearance. | |
| Curt Swan, Howard Sherman, John Daly, | Robotman begins. | |
| Dick Sprang and Jimmy Thompson art | Origin of Robotman. | |
| 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 | 36 | 4.46 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 2.8% | 0 2.8% | 0 2.8% | 1 5.6% | 0 5.6% | 2 11.1% | 0 11.1% | 3 19.4% | 2 25.0% | 1 27.8% | 6 44.4% | 3 53% | 2 58% | 5 72% | 4 83% | 0 83% | 3 92% | 0 92% | 2 97% | 0 97% | 1 100% |
| 1 BOOK | Restored | 4 | 2.88 | 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% | 1 25.0% | 0 25.0% | 1 50% | 0 50% | 0 50% | 0 50% | 1 75% | 0 75% | 0 75% | 0 75% | 1 100% |
| 1 BOOK | Qualified | 1 | 8.50 | 0 0.00% | 0 0.00% | 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% | 0 100% |
| Detective Comics #138 (1948, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 0% 0 9.6 | 3% 1 9.4 | 0% 0 9.2 | 0% 0 9.0 | 3% 1 8.5 | 0% 0 8.0 | 6% 2 7.5 | 0% 0 7.0 | 8% 3 6.5 | 6% 2 6.0 | 3% 1 5.5 | 17% 6 5.0 | 8% 3 4.5 | 6% 2 4.0 | 14% 5 3.5 | 11% 4 3.0 | 0% 0 2.5 | 8% 3 2.0 | 0% 0 1.8 | 6% 2 1.5 | 0% 0 1.0 | 3% 1 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||