Estonia. Michel 1–4 on cover, Registred letter sent from TARTU (Dorpat) 15.4.1919 to Berlin, franked with a complete set Mi 1-4. Postal route Tartu-Tallinn-Helsinki.-Berlin. The letter has been subject to Finnish mail censor check, due to the ongoing civil war in Finland. Transit cds Helsinki 16.4.1919, arrival cds Berlin 25.4.1919 on the back side of the cover.
