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| Amazing Spider-Man #138 | ||
| Marvel Comics, 11/74 | ||
| Gerry Conway story, Ross Andru, | Origin and 1st appearance of | |
| Frank Giacoia and Dave Hunt art | Mindworm (William Turner). | |
| Gil Kane and John Romita 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 | 874 | 8.76 | 0 0.00% | 0 0.00% | 99 11.3% | 168 30.5% | 139 46.5% | 101 58% | 96 69% | 79 78% | 51 84% | 38 88% | 30 92% | 21 94% | 18 96% | 8 97% | 10 98% | 4 99% | 5 99% | 4 100% | 1 100% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 1 100% |
| 1 BOOK | Signature | 19 | 8.55 | 0 0.00% | 0 0.00% | 1 5.3% | 5 31.6% | 2 42.1% | 2 53% | 2 63% | 2 74% | 1 79% | 1 84% | 1 89% | 0 89% | 0 89% | 0 89% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 17 | 6.94 | 0 0.00% | 0 0.00% | 0 0.0% | 1 5.9% | 1 11.8% | 2 23.5% | 0 23.5% | 2 35.3% | 1 41.2% | 0 41.2% | 2 53% | 1 59% | 2 71% | 1 76% | 1 82% | 1 88% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 3 | 8.20 | 0 0.00% | 0 0.00% | 0 0.0% | 1 33.3% | 0 33.3% | 0 33.3% | 0 33.3% | 0 33.3% | 1 67% | 0 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% |
| Amazing Spider-Man #138 (1974, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 11% 99 9.8 | 19% 168 9.6 | 16% 139 9.4 | 12% 101 9.2 | 11% 96 9.0 | 9% 79 8.5 | 6% 51 8.0 | 4% 38 7.5 | 3% 30 7.0 | 2% 21 6.5 | 2% 18 6.0 | 1% 8 5.5 | 1% 10 5.0 | 0% 4 4.5 | 1% 5 4.0 | 0% 4 3.5 | 0% 1 3.0 | 0% 1 2.5 | 0% 0 2.0 | 0% 0 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 1 0.5 |
| cgcdata.com, last updated March 17, 2026 | ||||||||||||||||||||||||