Airmail - International Stamp Exhibition "Exfilmex" - Mexico City, Mexico 1974
Now showing: Costa Rica - Postage stamps - 1974 - Airmail - International Stamp Exhibition "Exfilmex" - Mexico City, Mexico - 2 stamps.
Now showing: Costa Rica - Postage stamps - 1974 - Airmail - International Stamp Exhibition "Exfilmex" - Mexico City, Mexico - 2 stamps.