The stamps of the Kathiri State of Seiyun were valid for use throughout Aden. Used copies generally bear Aden GPO or Aden Camp cancels. Examples with cancels from offices in the Eastern Protectorate command a premium.
The French overseas territory of Somali Coast was renamed the French Territory of the Afars and Issas in 1967. It became the Djibouti Republic (which see) on June 27, 1977. 100 Centimes = 1 Franc