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| X-Men #99 | ||
| Marvel Comics, 6/76 | ||
| Chris Claremont story | 1st appearance of Black Tom Cassidy. | |
| Dave Cockrum & Frank Chiaramonte art | Sentinels appearance. | |
| Dave Cockrum 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 | 2,329 | 8.29 | 0 0.00% | 0 0.00% | 72 3.1% | 203 11.8% | 336 26.2% | 280 38.3% | 320 52% | 264 63% | 216 73% | 177 80% | 150 87% | 80 90% | 79 93% | 48 96% | 35 97% | 25 98% | 18 99% | 10 99% | 13 100% | 2 100% | 0 100% | 0 100% | 1 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 121 | 8.22 | 0 0.00% | 0 0.00% | 2 1.7% | 18 16.5% | 19 32.2% | 8 38.8% | 15 51% | 9 59% | 10 67% | 14 79% | 5 83% | 8 89% | 5 93% | 3 96% | 2 98% | 0 98% | 2 99% | 0 99% | 0 99% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 50 | 7.98 | 0 0.00% | 0 0.00% | 0 0.0% | 1 2.0% | 4 10.0% | 8 26.0% | 2 30.0% | 10 50% | 8 66% | 6 78% | 3 84% | 3 90% | 0 90% | 2 94% | 2 98% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 3 | 6.67 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 33.3% | 1 67% | 0 67% | 0 67% | 0 67% | 0 67% | 0 67% | 0 67% | 0 67% | 0 67% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| X-Men #99 (1976, Marvel Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 3% 72 9.8 | 9% 203 9.6 | 14% 336 9.4 | 12% 280 9.2 | 14% 320 9.0 | 11% 264 8.5 | 9% 216 8.0 | 8% 177 7.5 | 6% 150 7.0 | 3% 80 6.5 | 3% 79 6.0 | 2% 48 5.5 | 2% 35 5.0 | 1% 25 4.5 | 1% 18 4.0 | 0% 10 3.5 | 1% 13 3.0 | 0% 2 2.5 | 0% 0 2.0 | 0% 0 1.8 | 0% 1 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||