"Stomersee", red straight line, five clear strikes to reverse of registered cover with Russia 2 kopek green (4) and 10 kopek blue (5) to Russia with red double line "13.MAP.1919 Стомерзее" and registered label on front, undeliverable and retour with red arrival postmark, rare (H.v.H. 254.1, 254.2, 254.4)
