Airmail - International Stamp Exhibition Efimex '68 - Mexico City, Mexico 1968
Now showing: Mexico - Postage stamps - 1968 - Airmail - International Stamp Exhibition Efimex '68 - Mexico City, Mexico - 1 stamps.
![[Airmail - International Stamp Exhibition Efimex '68 - Mexico City, Mexico, type ASP]](https://www.stampworld.com/media/catalogue/Mexico/Postage-stamps/ASP-s.jpg)
Now showing: Mexico - Postage stamps - 1968 - Airmail - International Stamp Exhibition Efimex '68 - Mexico City, Mexico - 1 stamps.