2x 6N13S / 6H13C / 6AS7G / 6H5C SVETLANA Same Date 1970s NEW NOS Tubes
2x 6N13S / 6N5S / 6AS7G / 6H5C / 6H13C SVETLANA NEW NOS TUBES. 6N13S (6H13C) 100% New Item. SVETLANA factory. on the photo shows an example of tubes, current date code - 1979s. The tubes are new and never used.