Airmail - "For Poison Gas Victims" - Overprinted "FOR POISON GAS VICTIMS" and Surcharged 1967
Ora in esposizione: Regno dello Yemen - Francobolli postali - 1967 - Airmail - "For Poison Gas Victims" - Overprinted "FOR POISON GAS VICTIMS" and Surcharged - 3 francobolli.
