| PORTUGAL-CABO VERDE | 1961 (29 Dec) Aeroporto de Sal - West Germany, Altena, Westfalen. Registered reverse air multifkd envelope at 11 esc rate + R-label. VF comercial. |
U$ | 20 |
| PORTUGAL-CABO VERDE | 1961 (29 Dec) Aeroporto de Sal - West Germany, Altena, Westfalen. Registered reverse air multifkd envelope at 11 esc rate + R-label. VF comercial. |
U$ | 20 |