Postage and revenue stamps and postal history of Sarawak
Sarawak issued stamps that functioned as both postage and revenue purposes from 1869 to 1949 from the period of Raj of Sarawak, Japanese occupation, British Military Administration, to Crown Colony of Sarawak. == History == The Brooke government first issued postage rules on 1 March 1869, after the death of James Brooke.
Source: Wikipedia — Postage and revenue stamps and postal history of Sarawak (CC BY-SA 4.0)