| Image Thumbs | |
| Cert Num | 1269335 |
| Cert Date | 2013-08-22 |
| Catalog Number | 517 |
| Country | USA |
| Year | 1917 |
| Denom | 50c |
| Color | Red violet |
| Grade | F 70 |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, block of four, (the top left and bottom stamps never hinged) with a diagonal gum bend in the top left and bottom right stamps. |
| Cert Link | http://psestamp.com/Cert/1269335 |