Never used NOS tubes and Platinum rated and phono grade from Upscale Audio...as low noise as it gets. Will consider reasonable offers. From their website:"Made in the 1960's, with varying date codes from 1966 to 1968, made in Ulm Germany. This is the best made Telefunken 6922 / CCa / 7308 I have ever encountered. In fact... it's the best testing tube I have ever had here regardless of brand. Not only do they test at 100% or more for emissions and transconductance on both our Amplitrex and Triplett 3444A, 97% of them test to our Platinum grade standards... meaning a triode balance of 10% or tighter. I challenge anybody to come here and see how they test in person. I will take master packs of 100, and you pick one at random, and we’ll test it. These are shockingly good, so neutral and beautiful sounding you will name your next child after me." Upscale is getting picky now on who they will sell these to. Will cover shipping and PP fees at asking price to lower 48 states.
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