| Image Thumbs | |
| Cert Num | 1229820 |
| Cert Date | 2010-11-15 |
| Catalog Number | 514 |
| Country | USA |
| Year | 1917 |
| Denom | 15c |
| Color | Gray |
| Grade | Superb 98 |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, block of four, (the bottom stamps never hinged). |
| Cert Link | http://psestamp.com/Cert/1229820 |