| Image Thumbs | |
| Cert Num | 1285586 |
| Cert Date | 2014-06-25 |
| Catalog Number | 537b |
| Country | USA |
| Year | 1919 |
| Denom | 3c |
| Color | Light reddish violet |
| Grade | Ungraded |
| Description | Used |
| Opinion | it is a genuine usage of two Scott No. 537b and two Scott No. 599 on a trans-continental air mail cover, the cover with stains at the left and top right. |
| Cert Link | http://psestamp.com/Cert/1285586 |