Stamp of 1986 surcharged in black 2.50b on 1,000,000b. Previous value overprinted with four lines.
Yacimientos Petrolíferos Fiscales Bolivianos (YPFB) is a Bolivian state-owned enterprise dedicated to the exploration, exploitation, refining, industrialization, distribution and commercialization of oil, natural gas and derived products. It was created on December 21, 1936 under a government decree during the presidency of David Toro. YPFB is one of the biggest corporations in Bolivia.
