Los-Nr. 2021

1877, Folded envelope from Constantinople on May 10, after the start of the Russo-Turkish War, bearing three 1 pia. yellow 1875 issue on reverse, tied by boxed DERSAADET 3, alongside DERSAADET 5 (isf.no.25,RR), full content, addressed to Filibe, usual file fold, fine and scarce