El Salvador
Viser nu El Salvador - Post frimærker (1867 - 2020) - 2 frimærker.
1978
The 4th National Engineers' Congress, San Salvador
12. september VM: Ingen Perforeringer: 13½
1978
Airmail - The 4th National Engineers` Congress, San Salvador
12. september VM: Ingen Perforeringer: 13½