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ID = 60117
Great Britain (UK)
Brand: Ferranti, GB
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to SPTA = SP13C = 13SPA
Similar Tubes
Heater different:

Base British-7-Pin, old (M7A) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament Vf 13 Volts / If 0.2 Ampere / Indirect / Parallel / series AC/DC

Ferranti recommend this as a replacement for the SPTS by adding a Heater shunt of 130 ohms at 1.5W.

Literature - - Manufacturers Literature   

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