| Image Thumbs | |
| Cert Num | 1269628 |
| Cert Date | 2013-08-23 |
| Catalog Number | C21 |
| Country | USA |
| Year | 1937 |
| Denom | 20c |
| Color | Green |
| Grade | VF-XF 85 |
| Description | Mint OGph |
| Opinion | it is a genuine unused, o.g., previously hinged, bottom margin Plate No. 21623 block of six. |
| Cert Link | http://psestamp.com/Cert/1269628 |