Explorateur de timbres ↺ Scott or Y & T ? François Duvalier Central Hydroelectric Plant 1970-1971 Regular Stamps (1970) Sc 637 / YT 671 Sc 638 / YT 672 Inauguration of the François Duvalier Central Hydroelectric Plant 1971 (August 3, 1971) Sc B43 / YT 704 Sc B44 / YT 705 Alphabetization (December 23, 1971) Sc RA40 / YT 706 Sc RA41 / YT 707