In 1913 and 1914, Portugal issued postage stamps specifically for Tete Province, now part of Mozambique.
The 1913 stamps were those of the Vasco da Gama issue of 1898, overprinted "REPUBLICA / TETE" and a new denomination in centavos. Each of the eight values from Macau, Portuguese Africa and Timor were overprinted, yielding a total of 24 stamps. In 1914, the omnibus Ceres issue of Portugal included 16 values for Tete, ranging from 1/4 centavo to one escudo. Subsequently, Tete reverted to using the stamps of Mozambique. Although these stamps are not rare, none costing the collector over about US$10, genuinely-used examples are harder to find, and command a premium of about 50-100% over unused.