1881 (April 28), folded letter, datelined Klissura, to Plovdiv, franked with two 10pa black & green, tied by dual purple cork and green circular grid cancels, blue “Post Karlovo” Russian-type c.d.s. alongside (Apr 29), reverse with bilingual Plovdiv c.d.s. arrival backstamp (Apr 30), a fine and fascinating entire, provisionally cancelled in Klissura, and datetamped only upon arrival in Karlovo; rare, with 2022 Hitzler certificate.
