Offered are (3) RCA 6SN7GTB Twin Triodes.  These tubes have side "D" getters and offset black ladder style plates.  The tubes test good on the Hickok Dynamic Mutual Conductance  tester with no shorts or inter-element leakage.  Transconductance readings are robust and as follows:  3000/2750, 2650/2400 and 2350/2400.  3000/3000 is the max on the meter. Production codes are as follows: KL, RBX and KN. Likely early 1950's vintage.   Pick up these three for your own equipment or for projects upcoming. Mouse over the photo images to zoom in.  NO RESERVE!! Thanks for looking.