Tubes test at 97-97 and 96-96 on a refurbished and calibrated B&K 747b mutual conductance tester.  No shorts or grid emissions indicated.  Strong life indicated.

Any reading above 55 is considered passing and NOS usually tests between 100-120.

If no box is shown they will ship in a vintage box from another manufacturer.

Satisfaction guaranteed.  Any issues please contact me directly for a solution.  

Free shipping on additional tubes purchased at the same time. Wait for a invoice or I can refund the difference.

Thanks for looking!