This is a medium-mu twin triode in a glass envelope with an eight-pin octal base. This is a spare tube for Bus Drive Flip-flop Storage Rack serial # 11.
Date
ca. 1957
Manufacturer
Sylvania
Place Manufactured
U. S.
Identifying Numbers
Model number
6SN7WGT
Printed in silver on top of the glass envelope.
Other number
17FO V3-2
Written vertically in green ink on the glass envelope.
Other number
N1256
Written in green ink near the bottom of the glass envelope.
