Riau Archipelago

The Riau Archipelago is chain of islands stretching from Sumatra to the Malayan peninsula. It has been part of Indonesia since 1950.

In 1954 its first stamps were issued, with RIAU overprinted on Indonesian stamps. It became a separate province in 1957, continuing to have its own stamps overprinted RIAU. It returned to using Indonesian stamps at an unknown date.

 File:Riau 80s.jpg|80 sen value from the 1954 set. File:RIAU 25R.jpg|25 rupiah value from the 1954 issue. File:Riau Sukarno.jpg|2.50r value issued in 1960. 