U19 CV187 GEC Osram NOS
Direct heated Half wave rectifier
Vf 4 Volts / If 3.3 Ampere
made in Great Britain at Marconi-Osram Hammersmith tube factory in 1970's
black ladder anode, double O-getter
tested 100%
you will get the tube you can see at the pictures,
I always send the tubes by priority registered mail with tracking number within hours after receiving payment