Offered are (3) Telefunken 12AX7 Twin Triodes.  These three are branded Dynaco.  Each has smooth dark grey tall plates.  They have halo style getters with all good silver getter flashing at the top. Each tube has its diamond Telefunken bottom (30/2, 82 and 52).  The tubes have worn printed graphics.  They each test good on the Hickok Dynamic Tester-they show no shorts or inter-element leakage.  Triode readings are as follows: Gm: 2750/2500, 2400/2400 and 2400/2400.  These are robust readings for these types.  OEM tubes for the venerable Dynaco Preamps of the early 1960's. They are suitable for Hi Fi use as well as music instrument amps.  Pick up the tubes for your own best gear or for work upcoming. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.