Issued by the République de Guinée in March 1964, this 20 Franc stamp commemorates the construction of the Conakry water supply system (Adduction d’Eau Conakry). The sepia-toned design, printed by Courvoisier S.A., depicts workers installing large water pipes with machinery in the background — symbolizing Guinea’s early post-independence infrastructure development. This issue reflects the nation’s focus on modernization and improving living standards under the Sékou Touré government. A fine piece highlighting African progress themes of the 1960s.