U9MJ 1935 Swerdlovsk, Asiatic Russia

Operator: Konstantin Kozlovsky
1928 - 1933 au4BG, (SWL) RK-28
After WWII: UA9CF

The U9 callsigns started to be issued in mid 1933

QSL G4UZN Collection
Info courtesy of UY5XE
U9 info courtesy of RA3UX