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| Cert Num | 1338697 |
| Cert Date | 2017-11-30 |
| Catalog Number | E11 |
| Country | USA |
| Year | 1917 |
| Denom | 10c |
| Color | Ultramarine |
| Grade | Ungraded |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 11816 block of six, pink back variety. |
| Cert Link | http://psestamp.com/Cert/1338697 |