B65 MARCONI BADGED 6SN7GT CLEAR GLASS FAT BLACK BASE WHITE PRINT MADE AUGUST 1959 6SN7
B65 MARCONI BADGED 6SN7GT CLEAR GLASS FAT BLACK BASE WHITE PRINT MADE AUGUST 1959
This device carries the Marconi labelling along with B65 notation, the envelope also carries a date code for August 1959. This device shows good emission and superb matching for each triode section within each envelope - a hallmark of a good valve.