Stamp of Jānis Bērziņš-Ziemelis. Public domain photograph of Soviet postal stamp, USSR, free to use, no copyright restrictions image - Picryl description
Ian Karlovich Bierzin (1889-1938) Rus. Берзин, Ян Карлович –Soviet military, chief of Soviet military intelligence (Razvedupr) Arrested and executed by NKVD during the Great Purge.