NRL 1925 USSR
Nijni Novgorod Radio Laboratory was the 1st Soviet radio lab in the field of radio electronics.
NRL - is the legal call Radiolaboratory in Nijni-Nuvgorod: 1925-26 (op. Wladimir Petroff), 1926-28 - R1NN (branch of SKW ODR); 1928-33 - RA65; 1933-41 - eu2KAG.
R1NN Photo
Left to Right: R1AK, R1WG, R1UA, R1MA (standing)
UY5XE Collection