Following World War II, the city of Trieste and its environs was administered as the Free Territory of Trieste. The area was contested between Italy and Yugoslavia. Trieste was the southern point of the newly-descended Iron Curtain, as Yugoslavia had turned communist, therefore ‘upgrading’ a mere border dispute to a flashpoint with World War III potential.

In 1954, the so-called London Memorandum divided the Free Territory of Trieste in two zones, with Zone A falling under Italian jurisdiction and Zone B to be administered by Yugoslavia.

The memorandum was officialised by the signing of the 1975 Treaty of Osimo. In 1992, the independent state of Slovenia assumed jurisdiction over the former Yugoslav Zone B. 

On this map ‘Cona A’ and ‘Cona B’ are easily identifiable. The Slovenian place names Gorica and Trst indicate the now-Italian towns of Gorizia and Trieste. Trzic, Piran and Koper are presently Slovenian, N. Grad, Buje, Miu(e), Porec, Rovinj and Rijeka are Croatian.

This map appeared on a stamp issued in 2004 by Slovenia, commemorating the 50th anniversary of the London Memorandum. The map was found on Dan’s Topical Stams, an excellent philately website which I’m sure to revisit, as it features many interesting maps…