This listing is for a good used vintage Sylvania type 12SN7GT twin triode vacuum tube.

This tube 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 for the triode sections:  2850/3000.  Both sections tested above new tube specs, and closely matched! 

Ref: Minimum readings should be 1560/1560 micromhos and new tubes should test at 2600/2600 or more micromhos.

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

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