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| Cert Num | 1387839 |
| Cert Date | 2020-12-11 |
| Catalog Number | 517 |
| Country | USA |
| Year | 1917 |
| Denom | 50c |
| Color | Red violet |
| Grade | XF 90 |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, bottom margin Plate No. 7040 strip of three, the center stamp with a ball point pen marking on the ungummed selvage. |
| Cert Link | http://psestamp.com/Cert/1387839 |