The banknotes of Azores were printed by the Banco de Portugal from 1876 upto 1910, while the currency (current) in the Numista catalog shows "Azores- Real (decimalised, 1843-1901)" thus requiring to it's modification to "Azores- Real (decimalised, 1843-1911)".
The possible cause is that Numista is predominantly more coin based, than banknote. Thus while coins stopped minting for Azores in 1901, the currency did not stop in the archipelago- but continued in form of paper money, with numista sticking to the date of end for coins.
The Azorean real, also known as the Azorean Moeda Insulana (Insular Currency) was the currency of the Portuguese archipelago of the Azores, from 1829 to 1911, with the Portuguese escudo replacing it in 1911. Azorean Real was decimalised in the period of 1840-1840. Coins were minted in Azorean Real upto 1901, while banknotes were printed by the Banco de Portugal upto 1910.
Wiki: Azorean real
Standard Catalog of World Coins 1801-1900, George S.Cuhaj (page 100-102)
Standard Catalog of World Coins 1901-2000, George S.Cuhaj (page 134-135)
Standard Catalog of World Paper Money- General Issues, George S.Cuhaj (page 101-102)