1881 (September 6), receipt for the private conveyance of mail by Ivan Mihalev and Kanju Valkov between Sliven and Jambol, struck with blue double Post Horn negative seal “East Rumelian Post / Jambol”, light filing folds, a scarce document.
Note: Under the Eastern Rumelia postal regulations of September 1881, post offices were permitted to have mail transported privately; receipts such as these were issued for mail transported by such means.
