1881 (March 31), 10pa black & green, perforated 13.5, horizontal pair, tied to folded letter from Klissura (per sender’s notation), cancelled with purple provisional cork cancel, to Plovdiv via Karolovo, in Karlovo further cancelled with circular blue grid and corresponding c.d.s. (Apr 1), backstamped the next day with “Poste Plovdiv” c.d.s. receiver, a fine and important cover, demonstrating both an early usage of the rare Klissura provisional cork, but also one of the latest recorded usages of the Plovdiv Russian-type c.d.s; with 2022 Hitzler certificate.
