On April 27, at 17:00, at the History Museum of Armenia, a lecture was held on the establishment and development of the RA postal service (1919-1920), the first three years of the postal service of Soviet Armenia (1921-1923), as well as a short period of issuing its own stamps. Rafael Nahapetyants, Professor, Doctor of Economic Sciences, gave a speech. Rare and unique materials (stamps and letters with stamps) from the collection of the History Museum of Armenia and from his own collection were displayed.