| Image Thumbs | |
| Cert Num | 1306850 |
| Cert Date | 2015-09-30 |
| Catalog Number | K13 |
| Country | USA |
| Year | 1919 |
| Denom | 40c on 20c |
| Color | Deep ultramarine |
| Grade | Ungraded |
| Description | Mint OGh |
| Opinion | it is a genuine unused, o.g., hinged, bottom margin Plate No. 12594 block of six (the upper left, upper right and bottom stamps never hinged). |
| Cert Link | http://psestamp.com/Cert/1306850 |