US cachet used for the Graf Zeppelin's Round-the-World Flight; [philatelic]
| Image2 | |
| City | Euclid |
| State | OH |
| Subject | Postal |
| Description | US cachet used for the Graf Zeppelin's Round-the-World Flight; [philatelic] |
| Year | 1980 |
| Month | 5 |
| Day | 3 |
| Color | black |
| Notes |