Lot 50127 – 1881, 5pa black on olive, horizontal pair, and 10 pa

1881, 5pa black on olive, horizontal pair, and 10 pa black on green single, all perf. 13 1/2, tied to 1881 cover by circular grid hs with bilingual “Kazanluk” cds below, all in blue. Cover roughly opened at right. A rare combination franking not included in the Franz See collection. Cert. Todd (2015).