1840 pre-philately cover addressed to Wilhelmine Krusenstern in navy school, Revel/Tallinn – St. Petersbourg

H/O 56:16. Addressed to “Madame Krusenstern, daughter of Kotzebue, St. Petersbourg, Navy School”. Addressee is Wilhelmine Krusenstern, wife of  explorer Paul Theodor von Krusenstern.