Hawaii, Postal Card, 1893, 2¢ black, locally addressed entire canceled by "Honolulu, H.I., Sep 4, 1893" duplex postmark; some mounting adhesion on reverse, Very Fine, the Earliest Known Usage of the 1893 3¢ Provisional Postal Card Entire. Scott No. UX6  Estimate $400 - 600. According to the Post Office in Paradise website, the earliest recorded usage of a UX6 is September 6, 1893 from Wailuku. $0 (Image)