Angra, Horta & Ponta Delgada
Between 1892 and 1906, the three administrative districts of the Azores had stamps issued inscribed with their names: Angra, Horta, and Ponta Delgada. The designs were identical to those of the regular Portuguese stamps, which were inscribed "CONTINENTE" to distinguish them, and the colors generally the same, with some lighter or darker.
Read more about this topic: Postage Stamps And Postal History Of The Azores