| Image Thumbs | |
| Cert Num | 1377146 |
| Cert Date | 2020-09-21 |
| Catalog Number | K3 |
| Country | USA |
| Year | 1919 |
| Denom | 6c on 3c |
| Color | Violet |
| Grade | Ungraded |
| Description | Used |
| Opinion | it is genuine usage tied on cover with Scott No. K2 to Switzerland by a U.S. Postal Agency, Shanghai, China duplex cancel dated Dec 7, 1921, the cover with a vertical crease. |
| Cert Link | http://psestamp.com/Cert/1377146 |