Theodore von Karman
Micronesia
1993. Pioneers of flight (2nd series)
| SG322 | 50c | Lawrence Sperry |
| SG323 | 50c | Santos-Dumont |
| SG324 | 50c | Hugh Dryden |
| SG325 | 50c | von Karman |
| SG326 | 50c | Orville Wright |
| SG327 | 50c | Wilbur Wright |
| SG328 | 50c | Otto Lilienthal |
| SG329 | 50c | Sir Thomas Sopwith |
United States of America
1992. Theodore von Karman
| SG2741 | 29c | Karman |
Used cover
Commemorative cover
First day cover
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