About #4 - 3 francs 1884 type 2
Reunion Island. Colonial Treasury. Decree of May 2, 1879. Saint-Denis, June 4, 1884. Second Type. Dimensions: 127 x 78 mm. Uniface banknote without watermark. Monochrome print in black on green or dark blue paper. Printer: Unknown. Front: Thumbnail composed of a frame of geometric patterns with the value "3" repeated in the corners. The value in letters "BON POUR TROIS FRANCS" is printed at the center of the note. No numbering. Two signatures: The Delegate of the Director of the Interior: Campenon and The Treasurer Payer: Veyrières. At the bottom of the note, the words "La contre-valeur en espèces est déposée au Trésor". No known specimens. Banknote very rare! Counterfeit note: a known copy in a collection.