| Image Thumbs | |
| Cert Num | 1345167 |
| Cert Date | 2018-05-21 |
| Catalog Number | 1789Pg |
| Country | USA |
| Year | 1979 |
| Denom | 15c |
| Color | multicolored |
| Grade | Ungraded |
| Description | Mint OGnh |
| Opinion | it is a genuine unused, o.g., never hinged, it is a genuine perforated proof gutter block of four with slight color mis-registration. |
| Cert Link | http://psestamp.com/Cert/1345167 |