El Salvador
Viser nu El Salvador - Post frimærker (1867 - 2020) - 2 frimærker.
1979
The 5th Latin-American Clinical Biochemistry Congress, San Salvador
1. november VM: Ingen Perforeringer: 14½ x 14
1979
Airmail - The 5th Latin-American Clinical Biochemistry Congress, San Salvador
1. november VM: Ingen Perforeringer: 14½ x 14