Ken-Rad EIA code

[aldovan]

Friends

What is the Ken-Rad EIA code?
I have some Ken-Rad tubes and the code is 188-5. But 188 do not is a GE code?
Or GE received this code when bought the Ken-Rad?

Aldovan

 

[PRR]

Yes, GE got Ken-Rad in 1945, also those numbers are not always the whole truth. (Tubes made under specific contract for another brand sometimes got coded as the contract, not the actual factory.)

I did not know this. In World War II, the Ken-Rad factory was threatened with a labor strike. It was seized by the War Dept.
Kentucky Electrical Lamp Company - Wikipedia