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| Cert Num | 1307927 |
| Cert Date | 2015-11-10 |
| Catalog Number | C2 |
| Country | USA |
| Year | 1918 |
| Denom | 16c |
| Color | Green |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, top margin block of six with Plate No. 8900 (the bottom center and bottom right stamps never hinged), the top right stamp with a small thin. |
| Cert Link | http://psestamp.com/Cert/1307927 |