2x Boxed 1950s CBS USA 7025 DGetter /w/DigitalAmplitrexTest /E83CC ECC803 12AX7
One of the highest ranked (and oldest) 12ax7 ever made, grail usa 1950s dgetter cbs usa, w/ authentic 7025 etch (important). + more rugged than other 12ax7 variety, early 7025 are ranked against german ecc803 + e83cc, and british b759 + m8137.