This is a double beam-power tube with a 1 + 6 pin septar base and two pins for the plate extending out the top of the envelope. One pin is larger than the others to provide the pin-one orientation. This is a spare tube for Register Driver S/N 6.
Manufacturer
RCA
Place Manufactured
U. S.
Identifying Numbers
Model number
3E29
Printed in white ink around glass envelope.
Other number
E948
Stamped in brown ink on glass envelope.
Other number
OMD3 V33
Handwritten in green ink vertically on glass envelope.
