ORA valve original box (display only), early example of a bright
emitter valve.
ORA = ‘Oscillator, Rectifier, and Amplifier’
Very early example as the later ones had a balloon envelope.
Complete with original box.
I am selling a number of collectable valves that I bought from a friend of mine who was extremely knowledgeable on the subject and wrote a number of books on the subject that are recognised as a main source of reference.