For sale is
one perfectly matched pair of genuine E283CC VALVO NOS NIB
Old type, old type boxes, made in 1960, factory matched, close unique codes.
True triple mica version.
They are carefully matched on calibrated Metrix U61B tester and are also tested for noise and microphonics in RIAA preamp. Perfect pair!
This is a private listing and I do not accept returns. These valves are carefully matched and they are 100% in perfect working condition, I simply can not take responsibility for some users who do not know how to change tubes in their amplifiers.