Imperial Russia? Scott 24a on cover from Egorewsk

Imperial Russia – RSFSR – CCCP – BOB – Russian states stamps. Conditions: Very fine (VF), without any defects – please see enlarged images: front and back and stamp alone. Additional details: Rare stamp (paper/watermark variety) on sligtly redused cover from egoriewsk to Ryazan court. Additional details:Vertically laid paper, undamaged perforation – 14, vivid colors. […]