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| Cert Num | 1264789 |
| Cert Date | 2013-05-10 |
| Catalog Number | 515 |
| Country | USA |
| Year | 1917 |
| Denom | 20c |
| Color | Light ultramarine |
| Grade | Ungraded |
| Description | Mint OGh |
| Opinion | it is a genuine unused, o.g., hinged, vertical pair, the top stamp with horizontal blinded perfs at the bottom in the design. |
| Cert Link | http://psestamp.com/Cert/1264789 |