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10th anniv. (in 1964) of the Arab Postal Union (APU) - 4piastre

Issued in 1966, this stamp commemorates the 10th anniversary of the Arab Postal Union (APU), founded in 1954 to strengthen cooperation among the postal administrations of Arab countries. The organization was established to improve the exchange of mail, standardize postal procedures, and promote collaboration in communications, helping to facilitate economic, cultural, and social links throughout the Arab world. By issuing this commemorative stamp, the Kingdom of Saudi Arabia celebrated a decade of regional postal cooperation and recognized the important role of the Arab Postal Union in enhancing communication among member states. The issue highlighted the value of efficient postal services in supporting trade, administration, and cultural exchange, while emphasizing the broader goal of strengthening ties and cooperation among Arab nations.