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| House of Mystery #156 | ||
| DC Comics, 1/66 | ||
| Dave Wood and Jack Miller stories | Origin and 1st appearance of | |
| Jim Mooney and Joe Certa art | Dial H for Hero (Robby Reed). | |
| Jim Mooney cover | Martian Manhunter backup story. | |
| 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 | 107 | 7.34 | 0 0.00% | 0 0.00% | 1 0.9% | 5 5.6% | 7 12.1% | 6 17.8% | 9 26.2% | 5 30.8% | 14 43.9% | 15 58% | 9 66% | 11 77% | 5 81% | 6 87% | 6 93% | 2 94% | 4 98% | 0 98% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 1 | 9.20 | 0 0.00% | 0 0.00% | 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% | 0 100% |
| House of Mystery #156 (1966, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 1% 1 9.8 | 5% 5 9.6 | 7% 7 9.4 | 6% 6 9.2 | 8% 9 9.0 | 5% 5 8.5 | 13% 14 8.0 | 14% 15 7.5 | 8% 9 7.0 | 10% 11 6.5 | 5% 5 6.0 | 6% 6 5.5 | 6% 6 5.0 | 2% 2 4.5 | 4% 4 4.0 | 0% 0 3.5 | 2% 2 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 | ||||||||||||||||||||||||