6C4/CV133/EC90 GEC/Brimar NOS, black plates, big round getter, one pair (2)
3 in stock
GEC or Brimar 6C4/CV133/EC90 military print.
These tubes come with black plates and big round getters. Print styles may vary, but all have governmental prints as pictured.
We reserve the right to deliver other print styles than pictured.
These tubes are from the early 1950ies.
These tubes came in bulk from Swiss army surplus. All tubes are tested and burned-in/pre-aged (hence the colors on the tubes). The burn-in was done to secure stabilized operation in highly sensitive measuring instruments.
Some tubes may carry values written on them by the army personal or may have faded prints. This does of course not affect the proper operation.
All tubes are guaranteed to test as new!