Riau stamps contain only two pages.
Reffer to this source, the first time Riau stamps were issued on January 1, 1954.
Actually there's no special printing with the name of RIAU. All of the stamps were overprinted on Republik Indonesia's stamps. This area is between Sumatera island and Singapore.

Source: Katalog Prangko Indonesia 1998, published by PT Saros Kaprindo, Surabaya, Indonesia



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First Created - February 14, 1999 | Updated February 3, 2003