Airmail - "For Poison Gas Victims" - Overprinted "FOR POISON GAS VICTIMS" and Surcharged 1967
Ditunjukkan sekarang: Yemen, Kingdom - Setem-setem bayaran pos - 1967 - Airmail - "For Poison Gas Victims" - Overprinted "FOR POISON GAS VICTIMS" and Surcharged - 3 Setem-setem.
