Los 6520
"Марiенбургская 7 XI 19." Russian two line with handwritten date on vertical pair 35 k. brown on registered cover with handwritten registration label completed by manuscript, sent to the Estonian town of Walk, some small tears and folded twice vertically (H. v. H. 009.4)
Provenance: Estonia and Latvia - The Collection Harry von Hofmann (359. Heinrich Köhler Auction)