TUNGSRAM CK3 TUBE
OCTODE   Frequency converter   Controlling (mu)
19 Volts filament version of EK3 tube
extremely rare tube made in Hungary in mid 1930's
Successor of CK1 EK2 tubes
Predecessor of  UCH4 UCH21 tubes
Probably unused tube
looks great and tests 100%
 Ia=11mA  
where 11mA is 100% for the new tube
Europe side contact base P (P8A) Top contact with a cap
this tube was the part of a lot of radios from 1930's 40's of the past century
Swedish Kungs and Tjemeld, French ORA and many others
you will get the tube from the pictures
sorry no box this time
I always send the tubes by priority registered mail with tracking number within hours after receiving payment.