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| Action Comics #421 | ||
| DC Comics, 2/73 | ||
| Cary Bates and Elliot S. Maggin stories | 1st appearance of Captain Strong. | |
| Curt Swan, Murphy Anderson, Sal | Green Arrow backup story. | |
| Amendola, Dick Giordano art, Cardy 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 | 93 | 8.68 | 0 0.00% | 0 0.00% | 15 16.1% | 19 36.6% | 16 54% | 8 62% | 5 68% | 6 74% | 6 81% | 4 85% | 4 89% | 5 95% | 0 95% | 2 97% | 0 97% | 1 98% | 0 98% | 0 98% | 0 98% | 0 98% | 2 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 2 | 8.70 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 1 50% | 0 50% | 0 50% | 0 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% |
| Action Comics #421 (1973, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 16% 15 9.8 | 20% 19 9.6 | 17% 16 9.4 | 9% 8 9.2 | 5% 5 9.0 | 6% 6 8.5 | 6% 6 8.0 | 4% 4 7.5 | 4% 4 7.0 | 5% 5 6.5 | 0% 0 6.0 | 2% 2 5.5 | 0% 0 5.0 | 1% 1 4.5 | 0% 0 4.0 | 0% 0 3.5 | 0% 0 3.0 | 0% 0 2.5 | 2% 2 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 | ||||||||||||||||||||||||