This listing is for a vintage NOS (New Old Stock) GE type 12BA6 pentode vacuum tube in the original box. 

This tube tested great on a reliable Hickok 800A tube tester (a mutual conductance tester).

Here is the reading in micromhos: 3400.  ...and no shorts or gas detected.

Ref:  Minimum readings should be 1620 micromhos and new tubes should test at 2700 or more micromhos.

This tube tested well above new tube specs.

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