| Image Thumbs | |
| Cert Num | 1423371 |
| Cert Date | 2023-03-29 |
| Catalog Number | 148P3 |
| Country | USA |
| Year | 1870 |
| Denom | 6c |
| Color | Carmine |
| Grade | Ungraded |
| Description | Mint NGAI |
| Opinion | it is a genuine plate proof block of four on India paper, the top right and bottom left stamps with light creases. |
| Cert Link | http://psestamp.com/Cert/1423371 |