Germania 30 pfg. with additional franking tied by cds. "OSTROW -4.12.18" to registered cover, presumably first posted in the town of Lomza, with corresponding handwritten note in the provisional R label, the stamps in good condition, the cover with some flaws, commercial mail is enormously rare, sign. Petriuk with photo-certificate (2023) and photo-certificate Mikulski (2009)
