Duphar, are they stamps or not?

In Southern Arabia lies a small area near Hadramaut named Duphar or Zufar. It belongs to the Sultanate of Muscat and Oman, as it was known before August 8, 1970. During the reign of Sultan Sa'id bin Taimur (1932-1970), Duphar enjoyed a large degree of self-governance. The representative for Oman regarding the production and distribution of stamps, Youssef Salim Tadros from Beirut (who called himself an advisor to the Omani Postal Service), came up with the idea of ​​issuing 'its own' stamps for Duphar. That had happened before for Ajman with issues of Manama and for Sharjah of Khor Fakkan. Duphar was a similar province in Oman, so that plan had to succeed. By chance, the province revolted against the Sultan of Oman, resulting in the formation of a liberation government, the Duphar Liberation Front. For Tadros, this was all the more reason to expedite the issuance of 'his own' stamps. He was aided in this by reports appearing in the press stating that the rebellion of Duphar and the State of Oman had succeeded, allowing for the creation of an independent state. The stamps subsequently issued featuring Duphar and the State of Oman were even included in official stamp catalogs. And collectors were quite willing to purchase the beautiful images. But the rebellion ended without a takeover of the government and Sultan Qaboos bin Sa'id He succeeded his father Sa'id bin Taimur. That was on July 23, 1970. The Sultanate of Oman joined the Arab Postal Union on September 29, 1971, and became a member of the United Nations on July 1, 1971. Shortly thereafter, on October 7, 1971, Oman became a member of the Universal Postal Union (UPU). After Oman became a member of the Arab Postal Union, mail items franked with Duphar stamps were refused. Jordan was the first country to take this measure. But Syrie It continued to accept mail with Duphar stamps until June 1972. This helped Tadros.     In the meantime, various series of stamps had been issued. Because Tadros's plan fell apart in June 1972, no new stamps from Duphar and the State of Oman were issued. Nevertheless, many thousands of series from after June 1972 were sold to unsuspecting collectors through dealers. These stamps cannot be considered postage stamps; they were never registered with the UPU. However, postal items franked with stamps issued between April 15, 1972, and June 9, 1972, do possess historical postal value, even though they were issued through an agency. They reached their destination via official postal channels. And in doing so, they created their own story.   What happened to Tadros? His business was taken over by Clive H. Feigenbaum in London, who quietly continued issuing Duphar 'stamps'. To this end, he founded the 'Duphar Philatelic Agency', one of his many companies. He had the official series printed, which was issued on April 15, 1972, and was authorized until June 9, 1972. But they are very rare when actually used!   Do you also have stamps from countries with strange names? Such as Nagaland (mentioned earlier by A'z'ad Hind), Staffa, Lundy, Davaar Island, and the like? Please let me know! Perhaps there is a nice story to tell about them as well.