CV1985, BRIMAR, MIL SPEC 6SL7GT, , FAT BLACK BASE, ORANGE PRINT, ECC35, VT-229, FOOTSCRAY , MARCH 1952 PRODUCTION 6SL7

CV1985, BRIMAR, MIL SPEC 6SL7GT, , FAT BLACK BASE, ORANGE PRINT, ECC35, VT-229, FOOTSCRAY , MARCH 1952 PRODUCTION 6SL7

Carries both the envelope etched cartouche and date code for March 1952 along with a base CV1985 notation in orange ink base print.