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| Transformers #20 | ||
| Marvel Comics, 9/86 | ||
| Bob Budiansky story | Robot-Master appearance. | |
| Herb Trimpe, Ian Akin & Brian Garvey art | ||
| Herb Trimpe 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 | 170 | 9.37 | 0 0.00% | 0 0.00% | 72 42.4% | 48 71% | 20 82% | 9 88% | 8 92% | 1 93% | 3 95% | 1 95% | 3 97% | 0 97% | 1 98% | 1 98% | 0 98% | 0 98% | 1 99% | 1 99% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 2 | 8.25 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 50% | 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% |
| Transformers #20 (1986, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 42% 72 9.8 | 28% 48 9.6 | 12% 20 9.4 | 5% 9 9.2 | 5% 8 9.0 | 1% 1 8.5 | 2% 3 8.0 | 1% 1 7.5 | 2% 3 7.0 | 0% 0 6.5 | 1% 1 6.0 | 1% 1 5.5 | 0% 0 5.0 | 0% 0 4.5 | 1% 1 4.0 | 1% 1 3.5 | 1% 1 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 | ||||||||||||||||||||||||