This listing is for a good used antique Raytheon type 56 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 is the reading in micromhos: 2025 - well above new tube standards!

Ref:  Minimum readings should be 870 micromhos and new tubes should test at 1450 or more micromhos.

Note:  This tube has a slight rattle, but nothing is visible inside the glass bottle.  Probably some loose hardened glue that is trapped inside the base.

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

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