Description
NOS testing matched pair of Sylvania military spec JAN-CHS-12J5GT / VT-135 vacuum tubes. These tubes all test as NOS but appear to have been used because they don't have their original boxes or bulk pack. Some of them have oil on the pins which is fairly common to fight corrosion. Black plates, D foil getters. Fully tested and perfectly matched on a calibrated Hickok TV-7D/U - 100% guaranteed.