| Switzerland - XX | 1928 (29 May). Onex - Germany. Special flight fkd env. zurich - Geneve. Furth - Nurnberg special red cachet. Express mail / Air stamps. |
U$ | 115 |
| Switzerland - XX | 1928 (29 May). Onex - Germany. Special flight fkd env. zurich - Geneve. Furth - Nurnberg special red cachet. Express mail / Air stamps. |
U$ | 115 |