Airmail - International Stamp Exhibition "EFIMEX '68" - Mexico City, Mexico 1968
Now showing: Yemen, Kingdom - Postage stamps - 1968 - Airmail - International Stamp Exhibition "EFIMEX '68" - Mexico City, Mexico - 2 stamps.
Now showing: Yemen, Kingdom - Postage stamps - 1968 - Airmail - International Stamp Exhibition "EFIMEX '68" - Mexico City, Mexico - 2 stamps.