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B65 MARCONI BADGED 6SN7GT CLEAR GLASS FAT BLACK BASE WHITE PRINT MADE AUGUST 1959
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B65 MARCONI BADGED 6SN7GT CLEAR GLASS FAT BLACK BASE WHITE PRINT MADE AUGUST 1959

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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. 

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