Offered is a nice pair of Sylvania JAN 6V6GT Beam Power Tetrode Tubes.  Each tube tests good and strong on the Jackson dynamic tester and they show no shorts or inter-element leakage. The tubes have black plates and top getters with all good silver flashing. Matching date codes are as follows: 8139/AAX.  Used in audio output circuitry in push pull pairs in many amps and radios.   Each is tested good with strong readings. Pick up the nice pair for your own equipment. Mouse over the images to enlarge. NO RESERVE!! Thanks for looking.