This listing is for a pair of good used vintage Ken-Rad type 12SJ7 vacuum tubes with matching date codes. 

These tubes were made for the military and are printed "JAN-CKR-12SJ7 VT-162".

These tubes tested great on a reliable Hickok Model 800A tube tester (a dynamic mutual conductance tester).     ... and NO shorts or gas detected.

Here are the readings in micromhos: (from L-R)  - 2500 & 2300 - both  well above new tube standards!   

Ref: Minimum readings should be 990 micromhos (60%) and new tubes should test at 1650 or more micromhos. 

Satisfaction guaranteed!   --   $-$-$  --  Check out all the other items I have for $ale!   --  $-$-$

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